Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20404:227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
Summary: Splitting out a g1 allocator class to simply specialized allocators which can associate each allocation with a given context.
Reviewed-by: mgerdin, brutisso
| author | sjohanss |
|---|---|
| date | Fri, 05 Sep 2014 09:49:19 +0200 |
| parents | a8ea2f110d87 |
| children | e5668dcf12e9 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
| 1972 | 29 #include "precompiled.hpp" |
| 12080 | 30 #include "code/codeCache.hpp" |
| 1972 | 31 #include "code/icBuffer.hpp" |
| 32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
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45 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
| 20337 | 46 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" |
| 1972 | 47 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| 17764 | 48 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 49 #include "gc_implementation/g1/g1YCTypes.hpp" |
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50 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 51 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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52 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
| 1972 | 53 #include "gc_implementation/g1/vm_operations_g1.hpp" |
| 10405 | 54 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 55 #include "gc_implementation/shared/gcTimer.hpp" | |
| 56 #include "gc_implementation/shared/gcTrace.hpp" | |
| 57 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 58 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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59 #include "memory/allocation.hpp" |
| 1972 | 60 #include "memory/gcLocker.inline.hpp" |
| 61 #include "memory/generationSpec.hpp" | |
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62 #include "memory/iterator.hpp" |
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63 #include "memory/referenceProcessor.hpp" |
| 1972 | 64 #include "oops/oop.inline.hpp" |
| 65 #include "oops/oop.pcgc.inline.hpp" | |
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66 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 67 #include "runtime/vmThread.hpp" |
| 342 | 68 |
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69 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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70 |
| 342 | 71 // turn it on so that the contents of the young list (scan-only / |
| 72 // to-be-collected) are printed at "strategic" points before / during | |
| 73 // / after the collection --- this is useful for debugging | |
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74 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 75 // CURRENT STATUS |
| 76 // This file is under construction. Search for "FIXME". | |
| 77 | |
| 78 // INVARIANTS/NOTES | |
| 79 // | |
| 80 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 81 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 82 // and allocate_new_tlab, which are the "entry" points to the | |
| 83 // allocation code from the rest of the JVM. (Note that this does not | |
| 84 // apply to TLAB allocation, which is not part of this interface: it | |
| 85 // is done by clients of this interface.) | |
| 342 | 86 |
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87 // Notes on implementation of parallelism in different tasks. |
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88 // |
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89 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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90 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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91 // It does use run_task() which sets _n_workers in the task. |
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92 // G1ParTask executes g1_process_roots() -> |
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93 // SharedHeap::process_roots() which calls eventually to |
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94 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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95 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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96 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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97 // |
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98 |
| 342 | 99 // Local to this file. |
| 100 | |
| 101 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 102 bool _concurrent; | |
| 103 public: | |
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104 RefineCardTableEntryClosure() : _concurrent(true) { } |
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105 |
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106 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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107 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
| 1705 | 108 // This path is executed by the concurrent refine or mutator threads, |
| 109 // concurrently, and so we do not care if card_ptr contains references | |
| 110 // that point into the collection set. | |
| 111 assert(!oops_into_cset, "should be"); | |
| 112 | |
| 20192 | 113 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 114 // Caller will actually yield. |
| 115 return false; | |
| 116 } | |
| 117 // Otherwise, we finished successfully; return true. | |
| 118 return true; | |
| 119 } | |
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120 |
| 342 | 121 void set_concurrent(bool b) { _concurrent = b; } |
| 122 }; | |
| 123 | |
| 124 | |
| 125 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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126 size_t _num_processed; |
| 342 | 127 CardTableModRefBS* _ctbs; |
| 128 int _histo[256]; | |
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129 |
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130 public: |
| 342 | 131 ClearLoggedCardTableEntryClosure() : |
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132 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
| 342 | 133 { |
| 134 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 135 } | |
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136 |
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137 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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138 unsigned char* ujb = (unsigned char*)card_ptr; |
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139 int ind = (int)(*ujb); |
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140 _histo[ind]++; |
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141 |
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142 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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143 _num_processed++; |
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144 |
| 342 | 145 return true; |
| 146 } | |
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147 |
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148 size_t num_processed() { return _num_processed; } |
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149 |
| 342 | 150 void print_histo() { |
| 151 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 152 for (int i = 0; i < 256; i++) { | |
| 153 if (_histo[i] != 0) { | |
| 154 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 }; | |
| 159 | |
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160 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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161 private: |
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162 size_t _num_processed; |
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163 |
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164 public: |
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165 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
| 12343 | 166 |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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168 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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169 _num_processed++; |
| 342 | 170 return true; |
| 171 } | |
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172 |
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173 size_t num_processed() const { return _num_processed; } |
| 342 | 174 }; |
| 175 | |
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176 YoungList::YoungList(G1CollectedHeap* g1h) : |
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177 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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178 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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179 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 180 } |
| 181 | |
| 182 void YoungList::push_region(HeapRegion *hr) { | |
| 183 assert(!hr->is_young(), "should not already be young"); | |
| 184 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 185 | |
| 186 hr->set_next_young_region(_head); | |
| 187 _head = hr; | |
| 188 | |
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189 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 190 ++_length; |
| 191 } | |
| 192 | |
| 193 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 194 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 195 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 196 | |
| 197 hr->set_next_young_region(_survivor_head); | |
| 198 if (_survivor_head == NULL) { | |
| 545 | 199 _survivor_tail = hr; |
| 342 | 200 } |
| 201 _survivor_head = hr; | |
| 202 ++_survivor_length; | |
| 203 } | |
| 204 | |
| 205 void YoungList::empty_list(HeapRegion* list) { | |
| 206 while (list != NULL) { | |
| 207 HeapRegion* next = list->get_next_young_region(); | |
| 208 list->set_next_young_region(NULL); | |
| 209 list->uninstall_surv_rate_group(); | |
| 210 list->set_not_young(); | |
| 211 list = next; | |
| 212 } | |
| 213 } | |
| 214 | |
| 215 void YoungList::empty_list() { | |
| 216 assert(check_list_well_formed(), "young list should be well formed"); | |
| 217 | |
| 218 empty_list(_head); | |
| 219 _head = NULL; | |
| 220 _length = 0; | |
| 221 | |
| 222 empty_list(_survivor_head); | |
| 223 _survivor_head = NULL; | |
| 545 | 224 _survivor_tail = NULL; |
| 342 | 225 _survivor_length = 0; |
| 226 | |
| 227 _last_sampled_rs_lengths = 0; | |
| 228 | |
| 229 assert(check_list_empty(false), "just making sure..."); | |
| 230 } | |
| 231 | |
| 232 bool YoungList::check_list_well_formed() { | |
| 233 bool ret = true; | |
| 234 | |
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235 uint length = 0; |
| 342 | 236 HeapRegion* curr = _head; |
| 237 HeapRegion* last = NULL; | |
| 238 while (curr != NULL) { | |
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239 if (!curr->is_young()) { |
| 342 | 240 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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241 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 242 curr->bottom(), curr->end(), |
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243 curr->is_young(), curr->is_survivor()); |
| 342 | 244 ret = false; |
| 245 } | |
| 246 ++length; | |
| 247 last = curr; | |
| 248 curr = curr->get_next_young_region(); | |
| 249 } | |
| 250 ret = ret && (length == _length); | |
| 251 | |
| 252 if (!ret) { | |
| 253 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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254 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 255 length, _length); |
| 256 } | |
| 257 | |
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258 return ret; |
| 342 | 259 } |
| 260 | |
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261 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 262 bool ret = true; |
| 263 | |
| 264 if (_length != 0) { | |
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265 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 266 _length); |
| 267 ret = false; | |
| 268 } | |
| 269 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 270 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 271 ret = false; | |
| 272 } | |
| 273 if (_head != NULL) { | |
| 274 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 275 ret = false; | |
| 276 } | |
| 277 if (!ret) { | |
| 278 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 279 } | |
| 280 | |
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281 return ret; |
| 342 | 282 } |
| 283 | |
| 284 void | |
| 285 YoungList::rs_length_sampling_init() { | |
| 286 _sampled_rs_lengths = 0; | |
| 287 _curr = _head; | |
| 288 } | |
| 289 | |
| 290 bool | |
| 291 YoungList::rs_length_sampling_more() { | |
| 292 return _curr != NULL; | |
| 293 } | |
| 294 | |
| 295 void | |
| 296 YoungList::rs_length_sampling_next() { | |
| 297 assert( _curr != NULL, "invariant" ); | |
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298 size_t rs_length = _curr->rem_set()->occupied(); |
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299 |
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300 _sampled_rs_lengths += rs_length; |
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301 |
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302 // The current region may not yet have been added to the |
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303 // incremental collection set (it gets added when it is |
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304 // retired as the current allocation region). |
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305 if (_curr->in_collection_set()) { |
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306 // Update the collection set policy information for this region |
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307 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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308 } |
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309 |
| 342 | 310 _curr = _curr->get_next_young_region(); |
| 311 if (_curr == NULL) { | |
| 312 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 313 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 void | |
| 318 YoungList::reset_auxilary_lists() { | |
| 319 guarantee( is_empty(), "young list should be empty" ); | |
| 320 assert(check_list_well_formed(), "young list should be well formed"); | |
| 321 | |
| 322 // Add survivor regions to SurvRateGroup. | |
| 323 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 324 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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325 |
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326 int young_index_in_cset = 0; |
| 342 | 327 for (HeapRegion* curr = _survivor_head; |
| 328 curr != NULL; | |
| 329 curr = curr->get_next_young_region()) { | |
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330 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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331 |
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332 // The region is a non-empty survivor so let's add it to |
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333 // the incremental collection set for the next evacuation |
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334 // pause. |
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335 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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336 young_index_in_cset += 1; |
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337 } |
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338 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 339 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 340 | |
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341 _head = _survivor_head; |
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342 _length = _survivor_length; |
| 342 | 343 if (_survivor_head != NULL) { |
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344 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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345 assert(_survivor_length > 0, "invariant"); |
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346 _survivor_tail->set_next_young_region(NULL); |
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347 } |
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348 |
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349 // Don't clear the survivor list handles until the start of |
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350 // the next evacuation pause - we need it in order to re-tag |
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351 // the survivor regions from this evacuation pause as 'young' |
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352 // at the start of the next. |
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353 |
| 545 | 354 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 355 |
| 356 assert(check_list_well_formed(), "young list should be well formed"); | |
| 357 } | |
| 358 | |
| 359 void YoungList::print() { | |
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360 HeapRegion* lists[] = {_head, _survivor_head}; |
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361 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 362 |
| 363 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 364 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 365 HeapRegion *curr = lists[list]; | |
| 366 if (curr == NULL) | |
| 367 gclog_or_tty->print_cr(" empty"); | |
| 368 while (curr != NULL) { | |
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369 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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370 HR_FORMAT_PARAMS(curr), |
| 342 | 371 curr->prev_top_at_mark_start(), |
| 372 curr->next_top_at_mark_start(), | |
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373 curr->age_in_surv_rate_group_cond()); |
| 342 | 374 curr = curr->get_next_young_region(); |
| 375 } | |
| 376 } | |
| 377 | |
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378 gclog_or_tty->cr(); |
| 342 | 379 } |
| 380 | |
| 20337 | 381 void G1RegionMappingChangedListener::reset_from_card_cache(uint start_idx, size_t num_regions) { |
| 382 OtherRegionsTable::invalidate(start_idx, num_regions); | |
| 383 } | |
| 384 | |
| 385 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions) { | |
| 386 reset_from_card_cache(start_idx, num_regions); | |
| 387 } | |
| 388 | |
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389 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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390 { |
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391 // Claim the right to put the region on the dirty cards region list |
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392 // by installing a self pointer. |
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393 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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394 if (next == NULL) { |
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395 HeapRegion* res = (HeapRegion*) |
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396 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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397 NULL); |
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398 if (res == NULL) { |
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399 HeapRegion* head; |
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400 do { |
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401 // Put the region to the dirty cards region list. |
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402 head = _dirty_cards_region_list; |
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403 next = (HeapRegion*) |
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404 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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405 if (next == head) { |
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406 assert(hr->get_next_dirty_cards_region() == hr, |
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407 "hr->get_next_dirty_cards_region() != hr"); |
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408 if (next == NULL) { |
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409 // The last region in the list points to itself. |
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410 hr->set_next_dirty_cards_region(hr); |
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411 } else { |
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412 hr->set_next_dirty_cards_region(next); |
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413 } |
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414 } |
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415 } while (next != head); |
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416 } |
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417 } |
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418 } |
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419 |
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420 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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421 { |
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422 HeapRegion* head; |
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423 HeapRegion* hr; |
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424 do { |
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425 head = _dirty_cards_region_list; |
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426 if (head == NULL) { |
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427 return NULL; |
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428 } |
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429 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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430 if (head == new_head) { |
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431 // The last region. |
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432 new_head = NULL; |
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433 } |
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434 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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435 head); |
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436 } while (hr != head); |
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437 assert(hr != NULL, "invariant"); |
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438 hr->set_next_dirty_cards_region(NULL); |
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439 return hr; |
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440 } |
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441 |
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442 #ifdef ASSERT |
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443 // A region is added to the collection set as it is retired |
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444 // so an address p can point to a region which will be in the |
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445 // collection set but has not yet been retired. This method |
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446 // therefore is only accurate during a GC pause after all |
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447 // regions have been retired. It is used for debugging |
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448 // to check if an nmethod has references to objects that can |
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449 // be move during a partial collection. Though it can be |
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450 // inaccurate, it is sufficient for G1 because the conservative |
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451 // implementation of is_scavengable() for G1 will indicate that |
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452 // all nmethods must be scanned during a partial collection. |
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453 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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454 if (p == NULL) { |
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455 return false; |
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456 } |
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457 return heap_region_containing(p)->in_collection_set(); |
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458 } |
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459 #endif |
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460 |
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461 // Returns true if the reference points to an object that |
| 10405 | 462 // can move in an incremental collection. |
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463 bool G1CollectedHeap::is_scavengable(const void* p) { |
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464 HeapRegion* hr = heap_region_containing(p); |
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465 return !hr->isHumongous(); |
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466 } |
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467 |
| 342 | 468 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 469 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 470 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 471 |
| 472 // Count the dirty cards at the start. | |
| 473 CountNonCleanMemRegionClosure count1(this); | |
| 474 ct_bs->mod_card_iterate(&count1); | |
| 475 int orig_count = count1.n(); | |
| 476 | |
| 477 // First clear the logged cards. | |
| 478 ClearLoggedCardTableEntryClosure clear; | |
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479 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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480 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 481 clear.print_histo(); |
| 482 | |
| 483 // Now ensure that there's no dirty cards. | |
| 484 CountNonCleanMemRegionClosure count2(this); | |
| 485 ct_bs->mod_card_iterate(&count2); | |
| 486 if (count2.n() != 0) { | |
| 487 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 488 count2.n(), orig_count); | |
| 489 } | |
| 490 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 491 | |
| 492 RedirtyLoggedCardTableEntryClosure redirty; | |
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493 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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494 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 495 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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496 clear.num_processed(), orig_count); |
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497 guarantee(redirty.num_processed() == clear.num_processed(), |
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498 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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499 redirty.num_processed(), clear.num_processed())); |
| 342 | 500 |
| 501 CountNonCleanMemRegionClosure count3(this); | |
| 502 ct_bs->mod_card_iterate(&count3); | |
| 503 if (count3.n() != orig_count) { | |
| 504 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 505 orig_count, count3.n()); | |
| 506 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 // Private class members. | |
| 511 | |
| 512 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 513 | |
| 514 // Private methods. | |
| 515 | |
| 2152 | 516 HeapRegion* |
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517 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 518 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 519 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 520 if (!_secondary_free_list.is_empty()) { | |
| 521 if (G1ConcRegionFreeingVerbose) { | |
| 522 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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523 "secondary_free_list has %u entries", |
| 2152 | 524 _secondary_free_list.length()); |
| 525 } | |
| 526 // It looks as if there are free regions available on the | |
| 527 // secondary_free_list. Let's move them to the free_list and try | |
| 528 // again to allocate from it. | |
| 529 append_secondary_free_list(); | |
| 530 | |
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531 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
| 2152 | 532 "empty we should have moved at least one entry to the free_list"); |
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533 HeapRegion* res = _hrm.allocate_free_region(is_old); |
| 2152 | 534 if (G1ConcRegionFreeingVerbose) { |
| 535 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 536 "allocated "HR_FORMAT" from secondary_free_list", | |
| 537 HR_FORMAT_PARAMS(res)); | |
| 538 } | |
| 539 return res; | |
| 540 } | |
| 541 | |
| 10405 | 542 // Wait here until we get notified either when (a) there are no |
| 2152 | 543 // more free regions coming or (b) some regions have been moved on |
| 544 // the secondary_free_list. | |
| 545 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 546 } | |
| 547 | |
| 548 if (G1ConcRegionFreeingVerbose) { | |
| 549 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 550 "could not allocate from secondary_free_list"); | |
| 551 } | |
| 552 return NULL; | |
| 553 } | |
| 554 | |
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555 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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556 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 557 "the only time we use this to allocate a humongous region is " |
| 558 "when we are allocating a single humongous region"); | |
| 559 | |
| 560 HeapRegion* res; | |
| 561 if (G1StressConcRegionFreeing) { | |
| 562 if (!_secondary_free_list.is_empty()) { | |
| 563 if (G1ConcRegionFreeingVerbose) { | |
| 564 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 565 "forced to look at the secondary_free_list"); | |
| 566 } | |
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567 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 568 if (res != NULL) { |
| 569 return res; | |
| 570 } | |
| 571 } | |
| 572 } | |
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573 |
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574 res = _hrm.allocate_free_region(is_old); |
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575 |
| 2152 | 576 if (res == NULL) { |
| 577 if (G1ConcRegionFreeingVerbose) { | |
| 578 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 579 "res == NULL, trying the secondary_free_list"); | |
| 580 } | |
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581 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 582 } |
|
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583 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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584 // Currently, only attempts to allocate GC alloc regions set |
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585 // do_expand to true. So, we should only reach here during a |
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586 // safepoint. If this assumption changes we might have to |
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587 // reconsider the use of _expand_heap_after_alloc_failure. |
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588 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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589 |
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590 ergo_verbose1(ErgoHeapSizing, |
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591 "attempt heap expansion", |
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592 ergo_format_reason("region allocation request failed") |
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593 ergo_format_byte("allocation request"), |
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594 word_size * HeapWordSize); |
|
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595 if (expand(word_size * HeapWordSize)) { |
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596 // Given that expand() succeeded in expanding the heap, and we |
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597 // always expand the heap by an amount aligned to the heap |
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598 // region size, the free list should in theory not be empty. |
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599 // In either case allocate_free_region() will check for NULL. |
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600 res = _hrm.allocate_free_region(is_old); |
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601 } else { |
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602 _expand_heap_after_alloc_failure = false; |
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603 } |
| 342 | 604 } |
| 605 return res; | |
| 606 } | |
| 607 | |
| 2361 | 608 HeapWord* |
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609 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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610 uint num_regions, |
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611 size_t word_size, |
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612 AllocationContext_t context) { |
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613 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
| 2361 | 614 assert(isHumongous(word_size), "word_size should be humongous"); |
| 615 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 616 | |
| 617 // Index of last region in the series + 1. | |
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618 uint last = first + num_regions; |
| 2361 | 619 |
| 620 // We need to initialize the region(s) we just discovered. This is | |
| 621 // a bit tricky given that it can happen concurrently with | |
| 622 // refinement threads refining cards on these regions and | |
| 623 // potentially wanting to refine the BOT as they are scanning | |
| 624 // those cards (this can happen shortly after a cleanup; see CR | |
| 625 // 6991377). So we have to set up the region(s) carefully and in | |
| 626 // a specific order. | |
| 627 | |
| 628 // The word size sum of all the regions we will allocate. | |
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629 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 630 assert(word_size <= word_size_sum, "sanity"); |
| 631 | |
| 632 // This will be the "starts humongous" region. | |
| 3766 | 633 HeapRegion* first_hr = region_at(first); |
| 2361 | 634 // The header of the new object will be placed at the bottom of |
| 635 // the first region. | |
| 636 HeapWord* new_obj = first_hr->bottom(); | |
| 637 // This will be the new end of the first region in the series that | |
| 10405 | 638 // should also match the end of the last region in the series. |
| 2361 | 639 HeapWord* new_end = new_obj + word_size_sum; |
| 640 // This will be the new top of the first region that will reflect | |
| 641 // this allocation. | |
| 642 HeapWord* new_top = new_obj + word_size; | |
| 643 | |
| 644 // First, we need to zero the header of the space that we will be | |
| 645 // allocating. When we update top further down, some refinement | |
| 646 // threads might try to scan the region. By zeroing the header we | |
| 647 // ensure that any thread that will try to scan the region will | |
| 648 // come across the zero klass word and bail out. | |
| 649 // | |
| 650 // NOTE: It would not have been correct to have used | |
| 651 // CollectedHeap::fill_with_object() and make the space look like | |
| 652 // an int array. The thread that is doing the allocation will | |
| 653 // later update the object header to a potentially different array | |
| 654 // type and, for a very short period of time, the klass and length | |
| 655 // fields will be inconsistent. This could cause a refinement | |
| 656 // thread to calculate the object size incorrectly. | |
| 657 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 658 | |
| 659 // We will set up the first region as "starts humongous". This | |
| 660 // will also update the BOT covering all the regions to reflect | |
| 661 // that there is a single object that starts at the bottom of the | |
| 662 // first region. | |
| 663 first_hr->set_startsHumongous(new_top, new_end); | |
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664 first_hr->set_allocation_context(context); |
| 2361 | 665 // Then, if there are any, we will set up the "continues |
| 666 // humongous" regions. | |
| 667 HeapRegion* hr = NULL; | |
|
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668 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 669 hr = region_at(i); |
| 2361 | 670 hr->set_continuesHumongous(first_hr); |
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671 hr->set_allocation_context(context); |
| 2361 | 672 } |
| 673 // If we have "continues humongous" regions (hr != NULL), then the | |
| 674 // end of the last one should match new_end. | |
| 675 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 676 | |
| 677 // Up to this point no concurrent thread would have been able to | |
| 678 // do any scanning on any region in this series. All the top | |
| 679 // fields still point to bottom, so the intersection between | |
| 680 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 681 // update the top fields, we'll do a storestore to make sure that | |
| 682 // no thread sees the update to top before the zeroing of the | |
| 683 // object header and the BOT initialization. | |
| 684 OrderAccess::storestore(); | |
| 685 | |
| 686 // Now that the BOT and the object header have been initialized, | |
| 687 // we can update top of the "starts humongous" region. | |
| 688 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 689 "new_top should be in this region"); | |
| 690 first_hr->set_top(new_top); | |
|
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691 if (_hr_printer.is_active()) { |
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692 HeapWord* bottom = first_hr->bottom(); |
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693 HeapWord* end = first_hr->orig_end(); |
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694 if ((first + 1) == last) { |
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695 // the series has a single humongous region |
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696 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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697 } else { |
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698 // the series has more than one humongous regions |
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699 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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700 } |
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701 } |
| 2361 | 702 |
| 703 // Now, we will update the top fields of the "continues humongous" | |
| 704 // regions. The reason we need to do this is that, otherwise, | |
| 705 // these regions would look empty and this will confuse parts of | |
| 706 // G1. For example, the code that looks for a consecutive number | |
| 707 // of empty regions will consider them empty and try to | |
| 708 // re-allocate them. We can extend is_empty() to also include | |
| 709 // !continuesHumongous(), but it is easier to just update the top | |
| 710 // fields here. The way we set top for all regions (i.e., top == | |
| 711 // end for all regions but the last one, top == new_top for the | |
| 712 // last one) is actually used when we will free up the humongous | |
| 713 // region in free_humongous_region(). | |
| 714 hr = NULL; | |
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715 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 716 hr = region_at(i); |
| 2361 | 717 if ((i + 1) == last) { |
| 718 // last continues humongous region | |
| 719 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 720 "new_top should fall on this region"); | |
| 721 hr->set_top(new_top); | |
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722 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 723 } else { |
| 724 // not last one | |
| 725 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 726 hr->set_top(hr->end()); | |
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727 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 728 } |
| 729 } | |
| 730 // If we have continues humongous regions (hr != NULL), then the | |
| 731 // end of the last one should match new_end and its top should | |
| 732 // match new_top. | |
| 733 assert(hr == NULL || | |
| 734 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
|
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735 check_bitmaps("Humongous Region Allocation", first_hr); |
| 2361 | 736 |
| 737 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
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738 _allocator->increase_used(first_hr->used()); |
| 2361 | 739 _humongous_set.add(first_hr); |
| 740 | |
| 741 return new_obj; | |
| 742 } | |
| 743 | |
| 342 | 744 // If could fit into free regions w/o expansion, try. |
| 745 // Otherwise, if can expand, do so. | |
| 746 // Otherwise, if using ex regions might help, try with ex given back. | |
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747 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 748 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 749 | |
| 750 verify_region_sets_optional(); | |
| 342 | 751 |
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752 uint first = G1_NO_HRM_INDEX; |
|
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753 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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754 |
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755 if (obj_regions == 1) { |
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756 // Only one region to allocate, try to use a fast path by directly allocating |
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757 // from the free lists. Do not try to expand here, we will potentially do that |
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758 // later. |
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759 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
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760 if (hr != NULL) { |
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761 first = hr->hrm_index(); |
|
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762 } |
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763 } else { |
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764 // We can't allocate humongous regions spanning more than one region while |
|
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765 // cleanupComplete() is running, since some of the regions we find to be |
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766 // empty might not yet be added to the free list. It is not straightforward |
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767 // to know in which list they are on so that we can remove them. We only |
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768 // need to do this if we need to allocate more than one region to satisfy the |
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769 // current humongous allocation request. If we are only allocating one region |
| 20337 | 770 // we use the one-region region allocation code (see above), that already |
| 771 // potentially waits for regions from the secondary free list. | |
|
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772 wait_while_free_regions_coming(); |
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773 append_secondary_free_list_if_not_empty_with_lock(); |
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774 |
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775 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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776 // are lucky enough to find some. |
|
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777 first = _hrm.find_contiguous_only_empty(obj_regions); |
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778 if (first != G1_NO_HRM_INDEX) { |
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779 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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780 } |
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781 } |
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782 |
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783 if (first == G1_NO_HRM_INDEX) { |
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784 // Policy: We could not find enough regions for the humongous object in the |
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785 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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786 // If so, try expansion. |
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787 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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788 if (first != G1_NO_HRM_INDEX) { |
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789 // We found something. Make sure these regions are committed, i.e. expand |
|
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790 // the heap. Alternatively we could do a defragmentation GC. |
|
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791 ergo_verbose1(ErgoHeapSizing, |
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792 "attempt heap expansion", |
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793 ergo_format_reason("humongous allocation request failed") |
|
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794 ergo_format_byte("allocation request"), |
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795 word_size * HeapWordSize); |
|
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796 |
|
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797 _hrm.expand_at(first, obj_regions); |
|
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798 g1_policy()->record_new_heap_size(num_regions()); |
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799 |
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800 #ifdef ASSERT |
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801 for (uint i = first; i < first + obj_regions; ++i) { |
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802 HeapRegion* hr = region_at(i); |
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803 assert(hr->is_empty(), "sanity"); |
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804 assert(is_on_master_free_list(hr), "sanity"); |
|
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805 } |
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806 #endif |
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807 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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808 } else { |
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809 // Policy: Potentially trigger a defragmentation GC. |
| 2152 | 810 } |
| 811 } | |
| 812 | |
| 2361 | 813 HeapWord* result = NULL; |
|
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814 if (first != G1_NO_HRM_INDEX) { |
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815 result = humongous_obj_allocate_initialize_regions(first, obj_regions, |
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816 word_size, context); |
| 2361 | 817 assert(result != NULL, "it should always return a valid result"); |
|
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818 |
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819 // A successful humongous object allocation changes the used space |
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820 // information of the old generation so we need to recalculate the |
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821 // sizes and update the jstat counters here. |
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822 g1mm()->update_sizes(); |
| 2152 | 823 } |
| 824 | |
| 825 verify_region_sets_optional(); | |
| 2361 | 826 |
| 827 return result; | |
| 342 | 828 } |
| 829 | |
| 1973 | 830 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 831 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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832 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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833 |
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834 unsigned int dummy_gc_count_before; |
|
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835 int dummy_gclocker_retry_count = 0; |
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836 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 837 } |
| 838 | |
| 839 HeapWord* | |
| 840 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 841 bool* gc_overhead_limit_was_exceeded) { |
| 842 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 843 |
| 10405 | 844 // Loop until the allocation is satisfied, or unsatisfied after GC. |
|
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845 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 846 unsigned int gc_count_before; |
|
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847 |
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848 HeapWord* result = NULL; |
|
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849 if (!isHumongous(word_size)) { |
|
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850 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
|
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851 } else { |
|
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852 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
|
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|
853 } |
|
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|
854 if (result != NULL) { |
|
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|
855 return result; |
| 342 | 856 } |
| 857 | |
| 858 // Create the garbage collection operation... | |
| 1973 | 859 VM_G1CollectForAllocation op(gc_count_before, word_size); |
|
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860 op.set_allocation_context(AllocationContext::current()); |
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|
861 |
| 342 | 862 // ...and get the VM thread to execute it. |
| 863 VMThread::execute(&op); | |
| 1973 | 864 |
| 865 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 866 // If the operation was successful we'll return the result even | |
| 867 // if it is NULL. If the allocation attempt failed immediately | |
| 868 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 869 HeapWord* result = op.result(); | |
| 870 if (result != NULL && !isHumongous(word_size)) { | |
| 871 // Allocations that take place on VM operations do not do any | |
| 872 // card dirtying and we have to do it here. We only have to do | |
| 873 // this for non-humongous allocations, though. | |
| 874 dirty_young_block(result, word_size); | |
| 875 } | |
| 342 | 876 return result; |
| 1973 | 877 } else { |
|
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878 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
|
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879 return NULL; |
|
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|
880 } |
| 1973 | 881 assert(op.result() == NULL, |
| 882 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 883 } |
| 884 | |
| 885 // Give a warning if we seem to be looping forever. | |
| 886 if ((QueuedAllocationWarningCount > 0) && | |
| 887 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 888 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 889 } |
| 890 } | |
| 1973 | 891 |
| 892 ShouldNotReachHere(); | |
|
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|
893 return NULL; |
| 342 | 894 } |
| 895 | |
|
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896 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
897 AllocationContext_t context, |
|
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|
898 unsigned int *gc_count_before_ret, |
|
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|
899 int* gclocker_retry_count_ret) { |
|
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900 // Make sure you read the note in attempt_allocation_humongous(). |
|
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901 |
|
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902 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
903 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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904 "be called for humongous allocation requests"); |
|
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|
905 |
|
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|
906 // We should only get here after the first-level allocation attempt |
|
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|
907 // (attempt_allocation()) failed to allocate. |
|
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|
908 |
|
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|
909 // We will loop until a) we manage to successfully perform the |
|
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|
910 // allocation or b) we successfully schedule a collection which |
|
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|
911 // fails to perform the allocation. b) is the only case when we'll |
|
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|
912 // return NULL. |
|
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|
913 HeapWord* result = NULL; |
|
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|
914 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
915 bool should_try_gc; |
|
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|
916 unsigned int gc_count_before; |
|
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|
917 |
|
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|
918 { |
|
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|
919 MutexLockerEx x(Heap_lock); |
|
20404
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|
920 result = _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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|
921 false /* bot_updates */); |
|
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|
922 if (result != NULL) { |
|
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|
923 return result; |
|
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|
924 } |
|
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|
925 |
|
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|
926 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
927 // allocate a new region. So the mutator alloc region should be NULL. |
|
20404
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changeset
|
928 assert(_allocator->mutator_alloc_region(context)->get() == NULL, "only way to get here"); |
|
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|
929 |
|
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|
930 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
931 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3886
diff
changeset
|
932 // No need for an ergo verbose message here, |
|
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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parents:
3886
diff
changeset
|
933 // can_expand_young_list() does this when it returns true. |
|
20404
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parents:
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diff
changeset
|
934 result = _allocator->mutator_alloc_region(context)->attempt_allocation_force(word_size, |
|
227a9e5e4b4a
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diff
changeset
|
935 false /* bot_updates */); |
|
2433
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changeset
|
936 if (result != NULL) { |
|
abdfc822206f
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|
937 return result; |
|
abdfc822206f
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|
938 } |
|
abdfc822206f
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|
939 } |
|
abdfc822206f
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diff
changeset
|
940 should_try_gc = false; |
|
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changeset
|
941 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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6064
diff
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|
942 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
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diff
changeset
|
943 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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6064
diff
changeset
|
944 // returns true). In this case we do not try this GC and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
945 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
946 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
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6064
diff
changeset
|
947 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
948 should_try_gc = false; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
949 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
950 // Read the GC count while still holding the Heap_lock. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
951 gc_count_before = total_collections(); |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
952 should_try_gc = true; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
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6064
diff
changeset
|
953 } |
|
2433
abdfc822206f
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|
954 } |
|
abdfc822206f
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diff
changeset
|
955 } |
|
abdfc822206f
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diff
changeset
|
956 |
|
abdfc822206f
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diff
changeset
|
957 if (should_try_gc) { |
|
abdfc822206f
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diff
changeset
|
958 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
959 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
960 GCCause::_g1_inc_collection_pause); |
|
2433
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diff
changeset
|
961 if (result != NULL) { |
|
abdfc822206f
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diff
changeset
|
962 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
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changeset
|
963 return result; |
|
abdfc822206f
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diff
changeset
|
964 } |
|
abdfc822206f
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diff
changeset
|
965 |
|
abdfc822206f
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diff
changeset
|
966 if (succeeded) { |
|
abdfc822206f
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diff
changeset
|
967 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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|
968 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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|
969 // further. We'll just return NULL. |
|
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|
970 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
971 *gc_count_before_ret = total_collections(); |
|
2433
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|
972 return NULL; |
|
abdfc822206f
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diff
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|
973 } |
|
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|
974 } else { |
|
8853
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|
975 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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changeset
|
976 MutexLockerEx x(Heap_lock); |
|
2e093b564241
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changeset
|
977 *gc_count_before_ret = total_collections(); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
978 return NULL; |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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changeset
|
979 } |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
980 // The GCLocker is either active or the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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6064
diff
changeset
|
981 // GC has not yet been performed. Stall until it is and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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diff
changeset
|
982 // then retry the allocation. |
|
2433
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changeset
|
983 GC_locker::stall_until_clear(); |
|
8853
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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diff
changeset
|
984 (*gclocker_retry_count_ret) += 1; |
|
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
985 } |
|
abdfc822206f
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diff
changeset
|
986 |
| 10405 | 987 // We can reach here if we were unsuccessful in scheduling a |
|
2433
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diff
changeset
|
988 // collection (because another thread beat us to it) or if we were |
|
abdfc822206f
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diff
changeset
|
989 // stalled due to the GC locker. In either can we should retry the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
990 // allocation attempt in case another thread successfully |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
991 // performed a collection and reclaimed enough space. We do the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
992 // first attempt (without holding the Heap_lock) here and the |
|
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993 // follow-on attempt will be at the start of the next loop |
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994 // iteration (after taking the Heap_lock). |
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995 result = _allocator->mutator_alloc_region(context)->attempt_allocation(word_size, |
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996 false /* bot_updates */); |
|
5963
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997 if (result != NULL) { |
|
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998 return result; |
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999 } |
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1000 |
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1001 // Give a warning if we seem to be looping forever. |
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1002 if ((QueuedAllocationWarningCount > 0) && |
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1003 (try_count % QueuedAllocationWarningCount == 0)) { |
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1004 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1005 "retries %d times", try_count); |
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1006 } |
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1007 } |
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1008 |
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1009 ShouldNotReachHere(); |
|
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1010 return NULL; |
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1011 } |
|
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1012 |
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1013 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1014 unsigned int * gc_count_before_ret, |
|
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1015 int* gclocker_retry_count_ret) { |
|
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1016 // The structure of this method has a lot of similarities to |
|
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1017 // attempt_allocation_slow(). The reason these two were not merged |
|
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1018 // into a single one is that such a method would require several "if |
|
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1019 // allocation is not humongous do this, otherwise do that" |
|
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1020 // conditional paths which would obscure its flow. In fact, an early |
|
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1021 // version of this code did use a unified method which was harder to |
|
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1022 // follow and, as a result, it had subtle bugs that were hard to |
|
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1023 // track down. So keeping these two methods separate allows each to |
|
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1024 // be more readable. It will be good to keep these two in sync as |
|
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1025 // much as possible. |
|
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1026 |
|
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1027 assert_heap_not_locked_and_not_at_safepoint(); |
|
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1028 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1029 "should only be called for humongous allocations"); |
|
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1030 |
|
4834
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|
1031 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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|
1032 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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|
1033 // the check before we do the actual allocation. The reason for doing it |
|
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|
1034 // before the allocation is that we avoid having to keep track of the newly |
|
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|
1035 // allocated memory while we do a GC. |
|
4910
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|
1036 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1037 word_size)) { |
|
4834
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|
1038 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1039 } |
|
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|
1040 |
|
2433
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|
1041 // We will loop until a) we manage to successfully perform the |
|
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1042 // allocation or b) we successfully schedule a collection which |
|
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|
1043 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1044 // return NULL. |
|
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|
1045 HeapWord* result = NULL; |
|
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|
1046 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1047 bool should_try_gc; |
|
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|
1048 unsigned int gc_count_before; |
|
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|
1049 |
|
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|
1050 { |
|
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|
1051 MutexLockerEx x(Heap_lock); |
|
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|
1052 |
|
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|
1053 // Given that humongous objects are not allocated in young |
|
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|
1054 // regions, we'll first try to do the allocation without doing a |
|
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|
1055 // collection hoping that there's enough space in the heap. |
|
20404
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|
1056 result = humongous_obj_allocate(word_size, AllocationContext::current()); |
|
2433
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|
1057 if (result != NULL) { |
|
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|
1058 return result; |
|
abdfc822206f
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|
1059 } |
|
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|
1060 |
|
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|
1061 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
1062 should_try_gc = false; |
|
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|
1063 } else { |
|
6106
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1064 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1065 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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|
1066 // returns true). In this case we do not try this GC and |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1067 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1068 // then retry the allocation. |
|
1d478c993020
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|
1069 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1070 should_try_gc = false; |
|
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|
1071 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1072 // Read the GC count while still holding the Heap_lock. |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
1073 gc_count_before = total_collections(); |
|
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|
1074 should_try_gc = true; |
|
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|
1075 } |
|
2433
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|
1076 } |
|
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|
1077 } |
|
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|
1078 |
|
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|
1079 if (should_try_gc) { |
|
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|
1080 // If we failed to allocate the humongous object, we should try to |
|
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|
1081 // do a collection pause (if we're allowed) in case it reclaims |
|
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|
1082 // enough space for the allocation to succeed after the pause. |
|
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|
1083 |
|
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diff
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|
1084 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
1085 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
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12082
diff
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|
1086 GCCause::_g1_humongous_allocation); |
|
2433
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|
1087 if (result != NULL) { |
|
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diff
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|
1088 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1089 return result; |
|
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diff
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|
1090 } |
|
abdfc822206f
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|
1091 |
|
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|
1092 if (succeeded) { |
|
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|
1093 // If we get here we successfully scheduled a collection which |
|
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|
1094 // failed to allocate. No point in trying to allocate |
|
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|
1095 // further. We'll just return NULL. |
|
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|
1096 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
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|
1097 *gc_count_before_ret = total_collections(); |
|
2433
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|
1098 return NULL; |
|
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|
1099 } |
|
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|
1100 } else { |
|
8853
2e093b564241
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|
1101 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
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changeset
|
1102 MutexLockerEx x(Heap_lock); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
1103 *gc_count_before_ret = total_collections(); |
|
2e093b564241
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|
1104 return NULL; |
|
2e093b564241
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|
1105 } |
|
6106
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|
1106 // The GCLocker is either active or the GCLocker initiated |
|
1d478c993020
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|
1107 // GC has not yet been performed. Stall until it is and |
|
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|
1108 // then retry the allocation. |
|
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1109 GC_locker::stall_until_clear(); |
|
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1110 (*gclocker_retry_count_ret) += 1; |
|
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1111 } |
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1112 |
| 10405 | 1113 // We can reach here if we were unsuccessful in scheduling a |
|
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1114 // collection (because another thread beat us to it) or if we were |
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1115 // stalled due to the GC locker. In either can we should retry the |
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1116 // allocation attempt in case another thread successfully |
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1117 // performed a collection and reclaimed enough space. Give a |
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1118 // warning if we seem to be looping forever. |
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1119 |
|
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1120 if ((QueuedAllocationWarningCount > 0) && |
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1121 (try_count % QueuedAllocationWarningCount == 0)) { |
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1122 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1123 "retries %d times", try_count); |
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1124 } |
|
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1125 } |
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1126 |
|
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1127 ShouldNotReachHere(); |
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1128 return NULL; |
|
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1129 } |
|
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1130 |
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1131 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1132 AllocationContext_t context, |
|
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1133 bool expect_null_mutator_alloc_region) { |
| 2152 | 1134 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1135 assert(_allocator->mutator_alloc_region(context)->get() == NULL || |
|
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1136 !expect_null_mutator_alloc_region, |
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1137 "the current alloc region was unexpectedly found to be non-NULL"); |
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1138 |
|
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1139 if (!isHumongous(word_size)) { |
|
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1140 return _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
|
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1141 false /* bot_updates */); |
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1142 } else { |
|
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1143 HeapWord* result = humongous_obj_allocate(word_size, context); |
|
4829
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1144 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1145 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1146 } |
|
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|
1147 return result; |
|
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|
1148 } |
|
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|
1149 |
|
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|
1150 ShouldNotReachHere(); |
| 342 | 1151 } |
| 1152 | |
| 1153 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1154 G1CollectedHeap* _g1h; |
| 342 | 1155 ModRefBarrierSet* _mr_bs; |
| 1156 public: | |
|
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1157 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1158 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1159 | |
| 342 | 1160 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1161 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1162 | |
|
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1163 if (r->continuesHumongous()) { |
| 12080 | 1164 // We'll assert that the strong code root list and RSet is empty |
| 1165 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1166 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1167 return false; |
|
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1168 } |
| 12080 | 1169 |
|
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1170 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1171 hrrs->clear(); |
| 342 | 1172 // You might think here that we could clear just the cards |
| 1173 // corresponding to the used region. But no: if we leave a dirty card | |
| 1174 // in a region we might allocate into, then it would prevent that card | |
| 1175 // from being enqueued, and cause it to be missed. | |
| 1176 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1177 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1178 |
| 342 | 1179 return false; |
| 1180 } | |
| 1181 }; | |
| 1182 | |
|
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1183 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1184 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1185 heap_region_iterate(&rs_clear); |
|
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1186 } |
| 342 | 1187 |
|
626
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|
1188 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1189 G1CollectedHeap* _g1h; |
|
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1190 UpdateRSOopClosure _cl; |
|
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|
1191 int _worker_i; |
|
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|
1192 public: |
|
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|
1193 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1194 _cl(g1->g1_rem_set(), worker_i), |
|
626
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|
1195 _worker_i(worker_i), |
|
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|
1196 _g1h(g1) |
|
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|
1197 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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parents:
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|
1198 |
|
626
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|
1199 bool doHeapRegion(HeapRegion* r) { |
|
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|
1200 if (!r->continuesHumongous()) { |
|
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|
1201 _cl.set_from(r); |
|
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|
1202 r->oop_iterate(&_cl); |
|
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|
1203 } |
|
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|
1204 return false; |
|
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|
1205 } |
|
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|
1206 }; |
|
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|
1207 |
|
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|
1208 class ParRebuildRSTask: public AbstractGangTask { |
|
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|
1209 G1CollectedHeap* _g1; |
|
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|
1210 public: |
|
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|
1211 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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|
1212 : AbstractGangTask("ParRebuildRSTask"), |
|
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|
1213 _g1(g1) |
|
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|
1214 { } |
|
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|
1215 |
|
4728
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|
1216 void work(uint worker_id) { |
|
441e946dc1af
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|
1217 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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4711
diff
changeset
|
1218 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
1219 _g1->workers()->active_workers(), |
|
626
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|
1220 HeapRegion::RebuildRSClaimValue); |
|
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|
1221 } |
|
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|
1222 }; |
|
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|
1223 |
|
3778
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|
1224 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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|
1225 private: |
|
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|
1226 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
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|
1227 public: |
|
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|
1228 bool doHeapRegion(HeapRegion* hr) { |
|
5f6f2615433a
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changeset
|
1229 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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|
1230 // We only generate output for non-empty regions. |
|
5f6f2615433a
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|
1231 if (!hr->is_empty()) { |
|
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|
1232 if (!hr->isHumongous()) { |
|
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changeset
|
1233 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1234 } else if (hr->startsHumongous()) { |
|
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1235 if (hr->region_num() == 1) { |
|
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|
1236 // single humongous region |
|
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changeset
|
1237 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1238 } else { |
|
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|
1239 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
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|
1240 } |
|
5f6f2615433a
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|
1241 } else { |
|
5f6f2615433a
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changeset
|
1242 assert(hr->continuesHumongous(), "only way to get here"); |
|
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changeset
|
1243 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
5f6f2615433a
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changeset
|
1244 } |
|
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changeset
|
1245 } |
|
5f6f2615433a
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changeset
|
1246 return false; |
|
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parents:
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|
1247 } |
|
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|
1248 |
|
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changeset
|
1249 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1250 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
1251 }; |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1252 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
1253 void G1CollectedHeap::print_hrm_post_compaction() { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
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diff
changeset
|
1254 PostCompactionPrinterClosure cl(hr_printer()); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
1255 heap_region_iterate(&cl); |
|
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|
1256 } |
|
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diff
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|
1257 |
| 1973 | 1258 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1259 bool clear_all_soft_refs, |
| 342 | 1260 size_t word_size) { |
| 2152 | 1261 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1262 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1263 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1264 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1265 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1266 |
| 10405 | 1267 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
1268 gc_timer->register_gc_start(); |
| 10405 | 1269 |
| 1270 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1271 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1272 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1273 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1274 ResourceMark rm; |
| 1275 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
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diff
changeset
|
1276 print_heap_before_gc(); |
| 10405 | 1277 trace_heap_before_gc(gc_tracer); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1278 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
17844
diff
changeset
|
1279 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
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|
1280 |
| 2152 | 1281 verify_region_sets_optional(); |
| 342 | 1282 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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diff
changeset
|
1283 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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diff
changeset
|
1284 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
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diff
changeset
|
1285 |
|
0bfd3fb24150
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jmasa
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1360
diff
changeset
|
1286 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
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jmasa
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diff
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|
1287 |
| 342 | 1288 { |
| 1289 IsGCActiveMark x; | |
| 1290 | |
| 1291 // Timing | |
| 6030 | 1292 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
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|
1293 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
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|
1294 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1295 |
| 342 | 1296 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
1297 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
10098
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|
1298 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
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|
1299 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1300 |
|
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|
1301 double start = os::elapsedTime(); |
|
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|
1302 g1_policy()->record_full_collection_start(); |
|
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|
1303 |
|
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|
1304 // Note: When we have a more flexible GC logging framework that |
|
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|
1305 // allows us to add optional attributes to a GC log record we |
|
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|
1306 // could consider timing and reporting how long we wait in the |
|
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|
1307 // following two methods. |
|
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|
1308 wait_while_free_regions_coming(); |
|
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|
1309 // If we start the compaction before the CM threads finish |
|
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|
1310 // scanning the root regions we might trip them over as we'll |
|
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|
1311 // be moving objects / updating references. So let's wait until |
|
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|
1312 // they are done. By telling them to abort, they should complete |
|
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|
1313 // early. |
|
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|
1314 _cm->root_regions()->abort(); |
|
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|
1315 _cm->root_regions()->wait_until_scan_finished(); |
|
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|
1316 append_secondary_free_list_if_not_empty_with_lock(); |
|
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|
1317 |
|
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|
1318 gc_prologue(true); |
|
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|
1319 increment_total_collections(true /* full gc */); |
|
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|
1320 increment_old_marking_cycles_started(); |
|
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|
1321 |
|
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changeset
|
1322 assert(used() == recalculate_used(), "Should be equal"); |
|
71013d764f6e
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|
1323 |
|
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|
1324 verify_before_gc(); |
|
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changeset
|
1325 |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
1326 check_bitmaps("Full GC Start"); |
| 10405 | 1327 pre_full_gc_dump(gc_timer); |
|
10098
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|
1328 |
|
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changeset
|
1329 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
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changeset
|
1330 |
|
71013d764f6e
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diff
changeset
|
1331 // Disable discovery and empty the discovered lists |
|
71013d764f6e
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changeset
|
1332 // for the CM ref processor. |
|
71013d764f6e
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changeset
|
1333 ref_processor_cm()->disable_discovery(); |
|
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changeset
|
1334 ref_processor_cm()->abandon_partial_discovery(); |
|
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changeset
|
1335 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1336 |
|
71013d764f6e
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diff
changeset
|
1337 // Abandon current iterations of concurrent marking and concurrent |
|
71013d764f6e
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diff
changeset
|
1338 // refinement, if any are in progress. We have to do this before |
|
71013d764f6e
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diff
changeset
|
1339 // wait_until_scan_finished() below. |
|
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diff
changeset
|
1340 concurrent_mark()->abort(); |
|
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changeset
|
1341 |
|
71013d764f6e
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diff
changeset
|
1342 // Make sure we'll choose a new allocation region afterwards. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1343 _allocator->release_mutator_alloc_region(); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
1344 _allocator->abandon_gc_alloc_regions(); |
|
10098
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|
1345 g1_rem_set()->cleanupHRRS(); |
|
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changeset
|
1346 |
|
71013d764f6e
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diff
changeset
|
1347 // We should call this after we retire any currently active alloc |
|
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diff
changeset
|
1348 // regions so that all the ALLOC / RETIRE events are generated |
|
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changeset
|
1349 // before the start GC event. |
|
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changeset
|
1350 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1351 |
|
71013d764f6e
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|
1352 // We may have added regions to the current incremental collection |
|
71013d764f6e
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diff
changeset
|
1353 // set between the last GC or pause and now. We need to clear the |
|
71013d764f6e
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|
1354 // incremental collection set and then start rebuilding it afresh |
|
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changeset
|
1355 // after this full GC. |
|
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changeset
|
1356 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1357 g1_policy()->clear_incremental_cset(); |
|
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|
1358 g1_policy()->stop_incremental_cset_building(); |
|
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|
1359 |
|
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|
1360 tear_down_region_sets(false /* free_list_only */); |
|
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|
1361 g1_policy()->set_gcs_are_young(true); |
|
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|
1362 |
|
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|
1363 // See the comments in g1CollectedHeap.hpp and |
|
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|
1364 // G1CollectedHeap::ref_processing_init() about |
|
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|
1365 // how reference processing currently works in G1. |
|
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|
1366 |
|
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|
1367 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1368 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1369 |
|
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|
1370 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1371 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1372 |
|
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changeset
|
1373 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1374 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1375 |
|
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|
1376 // Do collection work |
|
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|
1377 { |
|
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|
1378 HandleMark hm; // Discard invalid handles created during gc |
|
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changeset
|
1379 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1380 } |
|
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changeset
|
1381 |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
1382 assert(num_free_regions() == 0, "we should not have added any free regions"); |
|
10098
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|
1383 rebuild_region_sets(false /* free_list_only */); |
|
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1384 |
|
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1385 // Enqueue any discovered reference objects that have |
|
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1386 // not been removed from the discovered lists. |
|
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|
1387 ref_processor_stw()->enqueue_discovered_references(); |
|
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|
1388 |
|
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|
1389 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
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|
1390 |
|
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|
1391 MemoryService::track_memory_usage(); |
|
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|
1392 |
|
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|
1393 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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1394 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1395 |
|
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|
1396 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1397 ClassLoaderDataGraph::purge(); |
| 12080 | 1398 MetaspaceAux::verify_metrics(); |
|
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1399 |
|
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|
1400 // Note: since we've just done a full GC, concurrent |
|
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1401 // marking is no longer active. Therefore we need not |
|
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|
1402 // re-enable reference discovery for the CM ref processor. |
|
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1403 // That will be done at the start of the next marking cycle. |
|
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|
1404 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1405 ref_processor_cm()->verify_no_references_recorded(); |
|
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|
1406 |
|
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|
1407 reset_gc_time_stamp(); |
|
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|
1408 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1409 // sets, and clear all cards. Later we will rebuild remembered |
|
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1410 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1411 clear_rsets_post_compaction(); |
|
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|
1412 check_gc_time_stamps(); |
|
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|
1413 |
|
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|
1414 // Resize the heap if necessary. |
|
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|
1415 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1416 |
|
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|
1417 if (_hr_printer.is_active()) { |
|
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|
1418 // We should do this after we potentially resize the heap so |
|
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|
1419 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1420 // the end GC event. |
|
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|
1421 |
|
20377
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|
1422 print_hrm_post_compaction(); |
|
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|
1423 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1424 } |
|
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|
1425 |
|
10246
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|
1426 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
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|
1427 if (hot_card_cache->use_cache()) { |
|
194f52aa2f23
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|
1428 hot_card_cache->reset_card_counts(); |
|
194f52aa2f23
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|
1429 hot_card_cache->reset_hot_cache(); |
|
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|
1430 } |
|
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|
1431 |
|
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|
1432 // Rebuild remembered sets of all regions. |
|
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|
1433 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1434 uint n_workers = |
|
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|
1435 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1436 workers()->active_workers(), |
|
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|
1437 Threads::number_of_non_daemon_threads()); |
|
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|
1438 assert(UseDynamicNumberOfGCThreads || |
|
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|
1439 n_workers == workers()->total_workers(), |
|
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|
1440 "If not dynamic should be using all the workers"); |
|
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|
1441 workers()->set_active_workers(n_workers); |
|
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|
1442 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1443 // before a parallel phase and always reset it to 0 after |
|
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|
1444 // the phase so that the number of parallel threads does |
|
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|
1445 // no get carried forward to a serial phase where there |
|
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|
1446 // may be code that is "possibly_parallel". |
|
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|
1447 set_par_threads(n_workers); |
|
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|
1448 |
|
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|
1449 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1450 assert(check_heap_region_claim_values( |
|
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|
1451 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1452 assert(UseDynamicNumberOfGCThreads || |
|
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|
1453 workers()->active_workers() == workers()->total_workers(), |
|
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|
1454 "Unless dynamic should use total workers"); |
|
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|
1455 // Use the most recent number of active workers |
|
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|
1456 assert(workers()->active_workers() > 0, |
|
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|
1457 "Active workers not properly set"); |
|
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|
1458 set_par_threads(workers()->active_workers()); |
|
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|
1459 workers()->run_task(&rebuild_rs_task); |
|
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|
1460 set_par_threads(0); |
|
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|
1461 assert(check_heap_region_claim_values( |
|
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|
1462 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1463 reset_heap_region_claim_values(); |
|
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|
1464 } else { |
|
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|
1465 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1466 heap_region_iterate(&rebuild_rs); |
|
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|
1467 } |
|
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|
1468 |
| 12080 | 1469 // Rebuild the strong code root lists for each region |
| 1470 rebuild_strong_code_roots(); | |
| 1471 | |
|
10098
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|
1472 if (true) { // FIXME |
|
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|
1473 MetaspaceGC::compute_new_size(); |
|
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|
1474 } |
| 342 | 1475 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1476 #ifdef TRACESPINNING |
|
10098
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|
1477 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1478 #endif |
|
05c6d52fa7a9
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jmasa
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545
diff
changeset
|
1479 |
|
10098
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|
1480 // Discard all rset updates |
|
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|
1481 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1482 assert(!G1DeferredRSUpdate |
|
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|
1483 || (G1DeferredRSUpdate && |
|
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|
1484 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1485 |
|
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|
1486 _young_list->reset_sampled_info(); |
|
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|
1487 // At this point there should be no regions in the |
|
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|
1488 // entire heap tagged as young. |
|
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|
1489 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1490 "young list should be empty at this point"); |
|
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|
1491 |
|
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|
1492 // Update the number of full collections that have been completed. |
|
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|
1493 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1494 |
|
20377
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|
1495 _hrm.verify_optional(); |
|
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|
1496 verify_region_sets_optional(); |
|
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|
1497 |
|
10373
3a4805ad0005
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diff
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|
1498 verify_after_gc(); |
|
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|
1499 |
|
20291
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|
1500 // Clear the previous marking bitmap, if needed for bitmap verification. |
|
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|
1501 // Note we cannot do this when we clear the next marking bitmap in |
|
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|
1502 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
|
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|
1503 // objects marked during a full GC against the previous bitmap. |
|
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|
1504 // But we need to clear it before calling check_bitmaps below since |
|
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|
1505 // the full GC has compacted objects and updated TAMS but not updated |
|
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1506 // the prev bitmap. |
|
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1507 if (G1VerifyBitmaps) { |
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1508 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
|
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1509 } |
|
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1510 check_bitmaps("Full GC End"); |
|
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1511 |
|
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1512 // Start a new incremental collection set for the next pause |
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1513 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1514 g1_policy()->start_incremental_cset_building(); |
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1515 |
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1516 clear_cset_fast_test(); |
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1517 |
|
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1518 _allocator->init_mutator_alloc_region(); |
|
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1519 |
|
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1520 double end = os::elapsedTime(); |
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1521 g1_policy()->record_full_collection_end(); |
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1522 |
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1523 if (G1Log::fine()) { |
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1524 g1_policy()->print_heap_transition(); |
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1525 } |
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1526 |
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1527 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1528 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1529 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1530 // before any GC notifications are raised. |
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1531 g1mm()->update_sizes(); |
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1532 |
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1533 gc_epilogue(true); |
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1534 } |
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1535 |
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1536 if (G1Log::finer()) { |
|
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1537 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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1538 } |
|
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1539 |
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1540 print_heap_after_gc(); |
| 10405 | 1541 trace_heap_after_gc(gc_tracer); |
| 1542 | |
| 1543 post_full_gc_dump(gc_timer); | |
| 1544 | |
|
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1545 gc_timer->register_gc_end(); |
| 10405 | 1546 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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1547 } |
| 1973 | 1548 |
| 1549 return true; | |
| 342 | 1550 } |
| 1551 | |
| 1552 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1553 // do_collection() will return whether it succeeded in performing |
| 1554 // the GC. Currently, there is no facility on the | |
| 1555 // do_full_collection() API to notify the caller than the collection | |
| 1556 // did not succeed (e.g., because it was locked out by the GC | |
| 1557 // locker). So, right now, we'll ignore the return value. | |
| 1558 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1559 clear_all_soft_refs, | |
| 1560 0 /* word_size */); | |
| 342 | 1561 } |
| 1562 | |
| 1563 // This code is mostly copied from TenuredGeneration. | |
| 1564 void | |
| 1565 G1CollectedHeap:: | |
| 1566 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1567 // Include the current allocation, if any, and bytes that will be | |
| 1568 // pre-allocated to support collections, as "used". | |
| 1569 const size_t used_after_gc = used(); | |
| 1570 const size_t capacity_after_gc = capacity(); | |
| 1571 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1572 | |
|
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1573 // This is enforced in arguments.cpp. |
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1574 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1575 "otherwise the code below doesn't make sense"); |
|
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1576 |
| 342 | 1577 // We don't have floating point command-line arguments |
|
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1578 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1579 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1580 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1581 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1582 | |
|
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1583 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1584 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1585 |
|
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1586 // We have to be careful here as these two calculations can overflow |
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1587 // 32-bit size_t's. |
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1588 double used_after_gc_d = (double) used_after_gc; |
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1589 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1590 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1591 |
|
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1592 // Let's make sure that they are both under the max heap size, which |
|
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1593 // by default will make them fit into a size_t. |
|
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|
1594 double desired_capacity_upper_bound = (double) max_heap_size; |
|
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1595 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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|
1596 desired_capacity_upper_bound); |
|
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|
1597 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
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|
1598 desired_capacity_upper_bound); |
|
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|
1599 |
|
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1600 // We can now safely turn them into size_t's. |
|
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1601 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1602 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1603 |
|
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1604 // This assert only makes sense here, before we adjust them |
|
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|
1605 // with respect to the min and max heap size. |
|
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|
1606 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
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1607 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
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|
1608 "maximum_desired_capacity = "SIZE_FORMAT, |
|
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|
1609 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1610 |
|
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1611 // Should not be greater than the heap max size. No need to adjust |
|
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1612 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1613 // we'll try to make the capacity larger than it, not smaller). |
|
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|
1614 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
|
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1615 // Should not be less than the heap min size. No need to adjust it |
|
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1616 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1617 // we'll try to make the capacity smaller than it, not greater). |
|
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|
1618 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1619 |
|
1717
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1620 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1621 // Don't expand unless it's significant |
| 1622 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1623 ergo_verbose4(ErgoHeapSizing, |
|
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1624 "attempt heap expansion", |
|
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|
1625 ergo_format_reason("capacity lower than " |
|
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|
1626 "min desired capacity after Full GC") |
|
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|
1627 ergo_format_byte("capacity") |
|
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|
1628 ergo_format_byte("occupancy") |
|
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|
1629 ergo_format_byte_perc("min desired capacity"), |
|
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|
1630 capacity_after_gc, used_after_gc, |
|
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|
1631 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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|
1632 expand(expand_bytes); |
| 342 | 1633 |
| 1634 // No expansion, now see if we want to shrink | |
|
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1635 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1636 // Capacity too large, compute shrinking size |
| 1637 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1638 ergo_verbose4(ErgoHeapSizing, |
|
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1639 "attempt heap shrinking", |
|
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|
1640 ergo_format_reason("capacity higher than " |
|
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1641 "max desired capacity after Full GC") |
|
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|
1642 ergo_format_byte("capacity") |
|
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|
1643 ergo_format_byte("occupancy") |
|
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|
1644 ergo_format_byte_perc("max desired capacity"), |
|
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1645 capacity_after_gc, used_after_gc, |
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1646 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1647 shrink(shrink_bytes); |
| 1648 } | |
| 1649 } | |
| 1650 | |
| 1651 | |
| 1652 HeapWord* | |
| 1973 | 1653 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
|
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1654 AllocationContext_t context, |
| 1973 | 1655 bool* succeeded) { |
| 2152 | 1656 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1657 |
| 1658 *succeeded = true; | |
| 1659 // Let's attempt the allocation first. | |
|
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1660 HeapWord* result = |
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1661 attempt_allocation_at_safepoint(word_size, |
|
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1662 context, |
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1663 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1664 if (result != NULL) { |
| 1665 assert(*succeeded, "sanity"); | |
| 1666 return result; | |
| 1667 } | |
| 342 | 1668 |
| 1669 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1670 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1671 // expansion over collection. (This might change in the future if we can | |
| 1672 // do something smarter than full collection to satisfy a failed alloc.) | |
|
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1673 result = expand_and_allocate(word_size, context); |
| 342 | 1674 if (result != NULL) { |
| 1973 | 1675 assert(*succeeded, "sanity"); |
| 342 | 1676 return result; |
| 1677 } | |
| 1678 | |
| 1973 | 1679 // Expansion didn't work, we'll try to do a Full GC. |
| 1680 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1681 false, /* clear_all_soft_refs */ | |
| 1682 word_size); | |
| 1683 if (!gc_succeeded) { | |
| 1684 *succeeded = false; | |
| 1685 return NULL; | |
| 1686 } | |
| 1687 | |
| 1688 // Retry the allocation | |
| 1689 result = attempt_allocation_at_safepoint(word_size, | |
|
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1690 context, |
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1691 true /* expect_null_mutator_alloc_region */); |
| 342 | 1692 if (result != NULL) { |
| 1973 | 1693 assert(*succeeded, "sanity"); |
| 342 | 1694 return result; |
| 1695 } | |
| 1696 | |
| 1973 | 1697 // Then, try a Full GC that will collect all soft references. |
| 1698 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1699 true, /* clear_all_soft_refs */ | |
| 1700 word_size); | |
| 1701 if (!gc_succeeded) { | |
| 1702 *succeeded = false; | |
| 1703 return NULL; | |
| 1704 } | |
| 1705 | |
| 1706 // Retry the allocation once more | |
| 1707 result = attempt_allocation_at_safepoint(word_size, | |
|
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1708 context, |
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1709 true /* expect_null_mutator_alloc_region */); |
| 342 | 1710 if (result != NULL) { |
| 1973 | 1711 assert(*succeeded, "sanity"); |
| 342 | 1712 return result; |
| 1713 } | |
| 1714 | |
|
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1715 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1716 "Flag should have been handled and cleared prior to this point"); |
|
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1717 |
| 342 | 1718 // What else? We might try synchronous finalization later. If the total |
| 1719 // space available is large enough for the allocation, then a more | |
| 1720 // complete compaction phase than we've tried so far might be | |
| 1721 // appropriate. | |
| 1973 | 1722 assert(*succeeded, "sanity"); |
| 342 | 1723 return NULL; |
| 1724 } | |
| 1725 | |
| 1726 // Attempting to expand the heap sufficiently | |
| 1727 // to support an allocation of the given "word_size". If | |
| 1728 // successful, perform the allocation and return the address of the | |
| 1729 // allocated block, or else "NULL". | |
| 1730 | |
|
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1731 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size, AllocationContext_t context) { |
| 2152 | 1732 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1733 | |
| 1734 verify_region_sets_optional(); | |
| 1973 | 1735 |
|
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1736 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1737 ergo_verbose1(ErgoHeapSizing, |
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1738 "attempt heap expansion", |
|
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1739 ergo_format_reason("allocation request failed") |
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1740 ergo_format_byte("allocation request"), |
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1741 word_size * HeapWordSize); |
|
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1742 if (expand(expand_bytes)) { |
|
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1743 _hrm.verify_optional(); |
|
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1744 verify_region_sets_optional(); |
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1745 return attempt_allocation_at_safepoint(word_size, |
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1746 context, |
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1747 false /* expect_null_mutator_alloc_region */); |
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1748 } |
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1749 return NULL; |
| 342 | 1750 } |
| 1751 | |
|
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1752 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1753 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1754 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1755 HeapRegion::GrainBytes); | |
|
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1756 ergo_verbose2(ErgoHeapSizing, |
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1757 "expand the heap", |
|
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1758 ergo_format_byte("requested expansion amount") |
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1759 ergo_format_byte("attempted expansion amount"), |
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1760 expand_bytes, aligned_expand_bytes); |
|
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1761 |
|
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1762 if (is_maximal_no_gc()) { |
|
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1763 ergo_verbose0(ErgoHeapSizing, |
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1764 "did not expand the heap", |
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1765 ergo_format_reason("heap already fully expanded")); |
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1766 return false; |
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1767 } |
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1768 |
|
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1769 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
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1770 assert(regions_to_expand > 0, "Must expand by at least one region"); |
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1771 |
|
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1772 uint expanded_by = _hrm.expand_by(regions_to_expand); |
|
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1773 |
|
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1774 if (expanded_by > 0) { |
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1775 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
| 3766 | 1776 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
|
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1777 g1_policy()->record_new_heap_size(num_regions()); |
|
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1778 } else { |
|
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1779 ergo_verbose0(ErgoHeapSizing, |
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1780 "did not expand the heap", |
|
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1781 ergo_format_reason("heap expansion operation failed")); |
|
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1782 // The expansion of the virtual storage space was unsuccessful. |
|
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1783 // Let's see if it was because we ran out of swap. |
|
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1784 if (G1ExitOnExpansionFailure && |
|
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1785 _hrm.available() >= regions_to_expand) { |
|
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1786 // We had head room... |
|
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1787 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1788 } |
| 1789 } | |
|
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1790 return regions_to_expand > 0; |
| 342 | 1791 } |
| 1792 | |
| 3766 | 1793 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1794 size_t aligned_shrink_bytes = |
| 1795 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1796 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1797 HeapRegion::GrainBytes); | |
|
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1798 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1799 |
|
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1800 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
|
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1801 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
|
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1802 |
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1803 ergo_verbose3(ErgoHeapSizing, |
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1804 "shrink the heap", |
|
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1805 ergo_format_byte("requested shrinking amount") |
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1806 ergo_format_byte("aligned shrinking amount") |
|
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1807 ergo_format_byte("attempted shrinking amount"), |
|
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1808 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1809 if (num_regions_removed > 0) { |
|
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1810 g1_policy()->record_new_heap_size(num_regions()); |
|
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1811 } else { |
|
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1812 ergo_verbose0(ErgoHeapSizing, |
|
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1813 "did not shrink the heap", |
|
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1814 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1815 } |
| 1816 } | |
| 1817 | |
| 1818 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1819 verify_region_sets_optional(); |
| 1820 | |
|
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1821 // We should only reach here at the end of a Full GC which means we |
|
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1822 // should not not be holding to any GC alloc regions. The method |
|
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1823 // below will make sure of that and do any remaining clean up. |
|
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1824 _allocator->abandon_gc_alloc_regions(); |
|
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1825 |
| 2152 | 1826 // Instead of tearing down / rebuilding the free lists here, we |
| 1827 // could instead use the remove_all_pending() method on free_list to | |
| 1828 // remove only the ones that we need to remove. | |
| 4072 | 1829 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1830 shrink_helper(shrink_bytes); |
| 4072 | 1831 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1832 |
|
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1833 _hrm.verify_optional(); |
| 2152 | 1834 verify_region_sets_optional(); |
| 342 | 1835 } |
| 1836 | |
| 1837 // Public methods. | |
| 1838 | |
| 1839 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1840 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1841 #endif // _MSC_VER | |
| 1842 | |
| 1843 | |
| 1844 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1845 SharedHeap(policy_), | |
| 1846 _g1_policy(policy_), | |
| 1111 | 1847 _dirty_card_queue_set(false), |
| 1705 | 1848 _into_cset_dirty_card_queue_set(false), |
|
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1849 _is_alive_closure_cm(this), |
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1850 _is_alive_closure_stw(this), |
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1851 _ref_processor_cm(NULL), |
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1852 _ref_processor_stw(NULL), |
| 342 | 1853 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1854 _bot_shared(NULL), | |
| 10405 | 1855 _evac_failure_scan_stack(NULL), |
| 342 | 1856 _mark_in_progress(false), |
|
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1857 _cg1r(NULL), |
|
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1858 _g1mm(NULL), |
| 342 | 1859 _refine_cte_cl(NULL), |
| 1860 _full_collection(false), | |
|
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1861 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1862 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1863 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
|
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1864 _humongous_is_live(), |
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1865 _has_humongous_reclaim_candidates(false), |
| 2152 | 1866 _free_regions_coming(false), |
| 342 | 1867 _young_list(new YoungList(this)), |
| 1868 _gc_time_stamp(0), | |
| 6595 | 1869 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1870 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1871 _expand_heap_after_alloc_failure(true), |
| 526 | 1872 _surviving_young_words(NULL), |
|
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1873 _old_marking_cycles_started(0), |
|
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1874 _old_marking_cycles_completed(0), |
| 10405 | 1875 _concurrent_cycle_started(false), |
|
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1876 _in_cset_fast_test(), |
|
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1877 _dirty_cards_region_list(NULL), |
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1878 _worker_cset_start_region(NULL), |
| 10405 | 1879 _worker_cset_start_region_time_stamp(NULL), |
| 1880 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1881 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1882 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1883 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1884 | |
| 1885 _g1h = this; | |
| 342 | 1886 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1887 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1888 } | |
|
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1889 |
|
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1890 _allocator = G1Allocator::create_allocator(_g1h); |
|
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1891 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1892 |
| 342 | 1893 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1894 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1895 | |
|
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1896 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1897 assert(n_rem_sets > 0, "Invariant."); |
| 1898 | |
| 6197 | 1899 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1900 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1901 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1902 |
| 342 | 1903 for (int i = 0; i < n_queues; i++) { |
| 1904 RefToScanQueue* q = new RefToScanQueue(); | |
| 1905 q->initialize(); | |
| 1906 _task_queues->register_queue(i, q); | |
| 10405 | 1907 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1908 } | |
|
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1909 clear_cset_start_regions(); |
|
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1910 |
|
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1911 // Initialize the G1EvacuationFailureALot counters and flags. |
|
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1912 NOT_PRODUCT(reset_evacuation_should_fail();) |
|
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1913 |
| 342 | 1914 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1915 } | |
| 1916 | |
| 1917 jint G1CollectedHeap::initialize() { | |
| 1166 | 1918 CollectedHeap::pre_initialize(); |
| 342 | 1919 os::enable_vtime(); |
| 1920 | |
|
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1921 G1Log::init(); |
|
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1922 |
| 342 | 1923 // Necessary to satisfy locking discipline assertions. |
| 1924 | |
| 1925 MutexLocker x(Heap_lock); | |
| 1926 | |
|
3778
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1927 // We have to initialize the printer before committing the heap, as |
|
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1928 // it will be used then. |
|
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1929 _hr_printer.set_active(G1PrintHeapRegions); |
|
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|
1930 |
| 342 | 1931 // While there are no constraints in the GC code that HeapWordSize |
| 1932 // be any particular value, there are multiple other areas in the | |
| 1933 // system which believe this to be true (e.g. oop->object_size in some | |
| 1934 // cases incorrectly returns the size in wordSize units rather than | |
| 1935 // HeapWordSize). | |
| 1936 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1937 | |
| 1938 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1939 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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1940 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1941 |
| 1942 // Ensure that the sizes are properly aligned. | |
| 1943 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1944 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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1945 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1946 |
|
20216
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1947 _refine_cte_cl = new RefineCardTableEntryClosure(); |
|
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1948 |
|
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1949 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 1950 |
| 1951 // Reserve the maximum. | |
|
642
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1952 |
|
3824
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|
1953 // When compressed oops are enabled, the preferred heap base |
|
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1954 // is calculated by subtracting the requested size from the |
|
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1955 // 32Gb boundary and using the result as the base address for |
|
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|
1956 // heap reservation. If the requested size is not aligned to |
|
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|
1957 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
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|
1958 // into the ReservedHeapSpace constructor) then the actual |
|
6aa4feb8a366
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1959 // base of the reserved heap may end up differing from the |
|
6aa4feb8a366
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|
1960 // address that was requested (i.e. the preferred heap base). |
|
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|
1961 // If this happens then we could end up using a non-optimal |
|
6aa4feb8a366
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|
1962 // compressed oops mode. |
|
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7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
1963 |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
1964 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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|
1965 heap_alignment); |
| 342 | 1966 |
| 1967 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 1968 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 1969 // happen in asserts: DLD.) |
| 1970 _reserved.set_word_size(0); | |
| 1971 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 1972 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 1973 | |
| 1974 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 1975 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 1976 set_barrier_set(rem_set()->bs()); | |
| 12343 | 1977 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 1978 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 1979 return JNI_ENOMEM; |
| 1980 } | |
| 1981 | |
| 1982 // Also create a G1 rem set. | |
| 12343 | 1983 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 1984 |
| 1985 // Carve out the G1 part of the heap. | |
| 1986 | |
|
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|
1987 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
| 20337 | 1988 G1RegionToSpaceMapper* heap_storage = |
| 1989 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
| 1990 UseLargePages ? os::large_page_size() : os::vm_page_size(), | |
| 1991 HeapRegion::GrainBytes, | |
| 1992 1, | |
| 1993 mtJavaHeap); | |
| 1994 heap_storage->set_mapping_changed_listener(&_listener); | |
| 1995 | |
| 1996 // Reserve space for the block offset table. We do not support automatic uncommit | |
| 1997 // for the card table at this time. BOT only. | |
| 1998 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 1999 G1RegionToSpaceMapper* bot_storage = | |
| 2000 G1RegionToSpaceMapper::create_mapper(bot_rs, | |
| 2001 os::vm_page_size(), | |
| 2002 HeapRegion::GrainBytes, | |
| 2003 G1BlockOffsetSharedArray::N_bytes, | |
| 2004 mtGC); | |
| 2005 | |
| 2006 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2007 G1RegionToSpaceMapper* cardtable_storage = | |
| 2008 G1RegionToSpaceMapper::create_mapper(cardtable_rs, | |
| 2009 os::vm_page_size(), | |
| 2010 HeapRegion::GrainBytes, | |
| 2011 G1BlockOffsetSharedArray::N_bytes, | |
| 2012 mtGC); | |
| 2013 | |
| 2014 // Reserve space for the card counts table. | |
| 2015 ReservedSpace card_counts_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
| 2016 G1RegionToSpaceMapper* card_counts_storage = | |
| 2017 G1RegionToSpaceMapper::create_mapper(card_counts_rs, | |
| 2018 os::vm_page_size(), | |
| 2019 HeapRegion::GrainBytes, | |
| 2020 G1BlockOffsetSharedArray::N_bytes, | |
| 2021 mtGC); | |
| 2022 | |
| 2023 // Reserve space for prev and next bitmap. | |
| 2024 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); | |
| 2025 | |
| 2026 ReservedSpace prev_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2027 G1RegionToSpaceMapper* prev_bitmap_storage = | |
| 2028 G1RegionToSpaceMapper::create_mapper(prev_bitmap_rs, | |
| 2029 os::vm_page_size(), | |
| 2030 HeapRegion::GrainBytes, | |
| 2031 CMBitMap::mark_distance(), | |
| 2032 mtGC); | |
| 2033 | |
| 2034 ReservedSpace next_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
| 2035 G1RegionToSpaceMapper* next_bitmap_storage = | |
| 2036 G1RegionToSpaceMapper::create_mapper(next_bitmap_rs, | |
| 2037 os::vm_page_size(), | |
| 2038 HeapRegion::GrainBytes, | |
| 2039 CMBitMap::mark_distance(), | |
| 2040 mtGC); | |
| 2041 | |
|
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|
2042 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
| 20337 | 2043 g1_barrier_set()->initialize(cardtable_storage); |
| 2044 // Do later initialization work for concurrent refinement. | |
| 2045 _cg1r->init(card_counts_storage); | |
|
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|
2046 |
|
807
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6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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diff
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|
2047 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2048 // in the remembered set structures. |
|
6010
720b6a76dd9d
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diff
changeset
|
2049 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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diff
changeset
|
2050 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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diff
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|
2051 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2052 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
942
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6819085: G1: use larger and/or user settable region size
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diff
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|
2053 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
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diff
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|
2054 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
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6819085: G1: use larger and/or user settable region size
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diff
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|
2055 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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diff
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|
2056 |
|
17736
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8034079: G1: Refactor the HeapRegionSet hierarchy
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|
2057 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2058 |
| 20337 | 2059 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
| 342 | 2060 |
| 2061 _g1h = this; | |
| 2062 | |
|
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|
2063 _in_cset_fast_test.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
|
a8ea2f110d87
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|
2064 _humongous_is_live.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
|
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
2065 |
| 342 | 2066 // Create the ConcurrentMark data structure and thread. |
| 2067 // (Must do this late, so that "max_regions" is defined.) | |
| 20337 | 2068 _cm = new ConcurrentMark(this, prev_bitmap_storage, next_bitmap_storage); |
|
7397
442f942757c0
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diff
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|
2069 if (_cm == NULL || !_cm->completed_initialization()) { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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|
2070 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2071 return JNI_ENOMEM; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2072 } |
| 342 | 2073 _cmThread = _cm->cmThread(); |
| 2074 | |
| 2075 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2076 HeapRegionRemSet::init_heap(max_regions()); | |
| 2077 | |
| 677 | 2078 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2079 if (!expand(init_byte_size)) { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2080 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2081 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2082 } |
| 342 | 2083 |
| 2084 // Perform any initialization actions delegated to the policy. | |
| 2085 g1_policy()->init(); | |
| 2086 | |
| 2087 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2088 SATB_Q_FL_lock, | |
| 1111 | 2089 G1SATBProcessCompletedThreshold, |
| 342 | 2090 Shared_SATB_Q_lock); |
| 794 | 2091 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2092 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2093 DirtyCardQ_CBL_mon, |
| 794 | 2094 DirtyCardQ_FL_lock, |
| 1111 | 2095 concurrent_g1_refine()->yellow_zone(), |
| 2096 concurrent_g1_refine()->red_zone(), | |
| 794 | 2097 Shared_DirtyCardQ_lock); |
| 2098 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2099 if (G1DeferredRSUpdate) { |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2100 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2101 DirtyCardQ_CBL_mon, |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2102 DirtyCardQ_FL_lock, |
| 1111 | 2103 -1, // never trigger processing |
| 2104 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2105 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2106 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2107 } |
| 1705 | 2108 |
| 2109 // Initialize the card queue set used to hold cards containing | |
| 2110 // references into the collection set. | |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2111 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2112 DirtyCardQ_CBL_mon, |
| 1705 | 2113 DirtyCardQ_FL_lock, |
| 2114 -1, // never trigger processing | |
| 2115 -1, // no limit on length | |
| 2116 Shared_DirtyCardQ_lock, | |
| 2117 &JavaThread::dirty_card_queue_set()); | |
| 2118 | |
| 342 | 2119 // In case we're keeping closure specialization stats, initialize those |
| 2120 // counts and that mechanism. | |
| 2121 SpecializationStats::clear(); | |
| 2122 | |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2123 // Here we allocate the dummy HeapRegion that is required by the |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2124 // G1AllocRegion class. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2125 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
| 20337 | 2126 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2127 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2128 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2129 // region will complain that it cannot support allocations without |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2130 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2131 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2132 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2133 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2134 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2135 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2136 _allocator->init_mutator_alloc_region(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2137 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2138 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2139 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2140 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2141 |
| 17764 | 2142 G1StringDedup::initialize(); |
| 2143 | |
| 342 | 2144 return JNI_OK; |
| 2145 } | |
| 2146 | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2147 void G1CollectedHeap::stop() { |
| 17992 | 2148 // Stop all concurrent threads. We do this to make sure these threads |
| 2149 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2150 // that are destroyed during shutdown. |
| 17992 | 2151 _cg1r->stop(); |
| 2152 _cmThread->stop(); | |
| 2153 if (G1StringDedup::is_enabled()) { | |
| 2154 G1StringDedup::stop(); | |
| 2155 } | |
|
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2156 } |
|
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2157 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2158 void G1CollectedHeap::clear_humongous_is_live_table() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2159 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2160 _humongous_is_live.clear(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2161 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2162 |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2163 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2164 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2165 } |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2166 |
| 342 | 2167 void G1CollectedHeap::ref_processing_init() { |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2168 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2169 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2170 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2171 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2202 |
| 342 | 2203 SharedHeap::ref_processing_init(); |
| 2204 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2208 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // Reference discovery is not atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2219 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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|
2231 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2232 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
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|
2233 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2234 true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2235 // Reference discovery is atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
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diff
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|
2236 &_is_alive_closure_stw); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2237 // is alive closure |
|
4dfb2df418f2
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|
2238 // (for efficiency/performance) |
| 342 | 2239 } |
| 2240 | |
| 2241 size_t G1CollectedHeap::capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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20359
diff
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|
2242 return _hrm.length() * HeapRegion::GrainBytes; |
| 342 | 2243 } |
| 2244 | |
|
6254
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|
2245 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2246 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2247 hr->reset_gc_time_stamp(); |
|
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|
2248 if (hr->startsHumongous()) { |
|
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
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|
2249 uint first_index = hr->hrm_index() + 1; |
|
6254
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|
2250 uint last_index = hr->last_hc_index(); |
|
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|
2251 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2252 HeapRegion* chr = region_at(i); |
|
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|
2253 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2254 chr->reset_gc_time_stamp(); |
|
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|
2255 } |
|
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|
2256 } |
|
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|
2257 } |
|
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|
2258 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2259 #ifndef PRODUCT |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2260 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2261 private: |
|
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|
2262 unsigned _gc_time_stamp; |
|
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|
2263 bool _failures; |
|
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|
2264 |
|
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|
2265 public: |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2266 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2267 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2268 |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2269 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2270 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2271 if (_gc_time_stamp != region_gc_time_stamp) { |
|
a2f7274eb6ef
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|
2272 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2273 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2274 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2275 _failures = true; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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|
2276 } |
|
a2f7274eb6ef
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parents:
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diff
changeset
|
2277 return false; |
|
a2f7274eb6ef
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parents:
6220
diff
changeset
|
2278 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2279 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2280 bool failures() { return _failures; } |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2281 }; |
|
a2f7274eb6ef
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|
2282 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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changeset
|
2283 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2284 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2285 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2286 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2287 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2288 #endif // PRODUCT |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2289 |
| 1705 | 2290 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2291 DirtyCardQueue* into_cset_dcq, | |
| 2292 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2293 uint worker_i) { |
| 889 | 2294 // Clean cards in the hot card cache |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2295 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2296 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2297 |
| 342 | 2298 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2299 int n_completed_buffers = 0; | |
| 1705 | 2300 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2301 n_completed_buffers++; |
| 2302 } | |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
2303 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2304 dcqs.clear_n_completed_buffers(); |
| 2305 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2306 } | |
| 2307 | |
| 2308 | |
| 2309 // Computes the sum of the storage used by the various regions. | |
| 2310 size_t G1CollectedHeap::used() const { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2311 return _allocator->used(); |
| 342 | 2312 } |
| 2313 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2314 size_t G1CollectedHeap::used_unlocked() const { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2315 return _allocator->used_unlocked(); |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2316 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2317 |
| 342 | 2318 class SumUsedClosure: public HeapRegionClosure { |
| 2319 size_t _used; | |
| 2320 public: | |
| 2321 SumUsedClosure() : _used(0) {} | |
| 2322 bool doHeapRegion(HeapRegion* r) { | |
| 2323 if (!r->continuesHumongous()) { | |
| 2324 _used += r->used(); | |
| 2325 } | |
| 2326 return false; | |
| 2327 } | |
| 2328 size_t result() { return _used; } | |
| 2329 }; | |
| 2330 | |
| 2331 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2332 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
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|
2333 |
| 342 | 2334 SumUsedClosure blk; |
| 3766 | 2335 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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diff
changeset
|
2336 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2337 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2338 return blk.result(); |
| 2339 } | |
| 2340 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2341 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2342 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2343 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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diff
changeset
|
2344 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
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diff
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|
2345 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2346 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2347 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2348 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2349 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2350 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2351 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2352 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2353 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2354 // And as a result the region we'll allocate will be humongous. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2355 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2358 // Let's use the existing mechanism for the allocation |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2359 HeapWord* dummy_obj = humongous_obj_allocate(word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2360 AllocationContext::system()); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2361 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2362 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2363 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2364 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2365 // If we can't allocate once, we probably cannot allocate |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2366 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2367 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2368 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2369 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2370 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2371 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2372 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2373 void G1CollectedHeap::increment_old_marking_cycles_started() { |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2374 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2375 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2376 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2377 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2378 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2379 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2380 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2381 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2382 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2383 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2384 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2385 // We assume that if concurrent == true, then the caller is a |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2386 // concurrent thread that was joined the Suspendible Thread |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2387 // Set. If there's ever a cheap way to check this, we should add an |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2388 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2389 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2390 // Given that this method is called at the end of a Full GC or of a |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2391 // concurrent cycle, and those can be nested (i.e., a Full GC can |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2392 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2393 // completed should be either one (in the case where there was no |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2394 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2395 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2396 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2397 // This is the case for the inner caller, i.e. a Full GC. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2398 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2399 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2400 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2401 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2402 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2403 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2404 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2405 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2406 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2407 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2408 err_msg("for outer caller (concurrent cycle): " |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2409 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2412 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2414 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2415 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2416 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2417 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2418 // incorrectly see that a marking cycle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2419 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2420 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2421 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2422 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2423 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2424 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 // and it's waiting for a full GC to finish will be woken up. It is |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2427 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2429 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2430 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2431 _concurrent_cycle_started = true; |
| 2432 _gc_timer_cm->register_gc_start(start_time); | |
| 2433 | |
| 2434 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2435 trace_heap_before_gc(_gc_tracer_cm); | |
| 2436 } | |
| 2437 | |
| 2438 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2439 if (_concurrent_cycle_started) { | |
| 2440 if (_cm->has_aborted()) { | |
| 2441 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2442 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2443 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2444 _gc_timer_cm->register_gc_end(); |
| 10405 | 2445 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2446 | |
| 2447 _concurrent_cycle_started = false; | |
| 2448 } | |
| 2449 } | |
| 2450 | |
| 2451 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2452 if (_concurrent_cycle_started) { | |
| 2453 trace_heap_after_gc(_gc_tracer_cm); | |
| 2454 } | |
| 2455 } | |
| 2456 | |
| 2457 G1YCType G1CollectedHeap::yc_type() { | |
| 2458 bool is_young = g1_policy()->gcs_are_young(); | |
| 2459 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2460 bool is_during_mark = mark_in_progress(); | |
| 2461 | |
| 2462 if (is_initial_mark) { | |
| 2463 return InitialMark; | |
| 2464 } else if (is_during_mark) { | |
| 2465 return DuringMark; | |
| 2466 } else if (is_young) { | |
| 2467 return Normal; | |
| 2468 } else { | |
| 2469 return Mixed; | |
| 2470 } | |
| 2471 } | |
| 2472 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2473 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2474 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2475 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2477 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2478 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2479 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2480 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2481 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2482 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2483 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2484 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2485 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2486 // Read the GC count while holding the Heap_lock |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2487 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2488 old_marking_count_before = _old_marking_cycles_started; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2489 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2490 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2491 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2492 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2493 // concurrent cycle. We're setting word_size to 0 which means that |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2494 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2495 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2496 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2497 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2498 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2499 cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2500 op.set_allocation_context(AllocationContext::current()); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2501 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2502 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2503 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2504 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2505 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2506 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2507 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2508 // initial-mark GC. No point in starting a new cycle given |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2509 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2511 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2512 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2513 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2514 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2515 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2516 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2518 } else { |
|
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
20337
diff
changeset
|
2519 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2523 // to 0 which means that we are not requesting a post-GC allocation. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2524 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2525 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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|
2526 false, /* should_initiate_conc_mark */ |
|
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|
2527 g1_policy()->max_pause_time_ms(), |
|
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|
2528 cause); |
|
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|
2529 VMThread::execute(&op); |
|
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|
2530 } else { |
|
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|
2531 // Schedule a Full GC. |
|
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|
2532 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
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|
2533 VMThread::execute(&op); |
|
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|
2534 } |
|
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|
2535 } |
|
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|
2536 } while (retry_gc); |
| 342 | 2537 } |
| 2538 | |
| 2539 bool G1CollectedHeap::is_in(const void* p) const { | |
|
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|
2540 if (_hrm.reserved().contains(p)) { |
| 20337 | 2541 // Given that we know that p is in the reserved space, |
| 4708 | 2542 // heap_region_containing_raw() should successfully |
| 2543 // return the containing region. | |
| 2544 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2545 return hr->is_in(p); |
| 2546 } else { | |
|
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|
2547 return false; |
| 342 | 2548 } |
| 2549 } | |
| 2550 | |
| 20337 | 2551 #ifdef ASSERT |
| 2552 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
| 2553 bool contains = reserved_region().contains(p); | |
|
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|
2554 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
| 20337 | 2555 if (contains && available) { |
| 2556 return true; | |
| 2557 } else { | |
| 2558 return false; | |
| 2559 } | |
| 2560 } | |
| 2561 #endif | |
| 2562 | |
| 342 | 2563 // Iteration functions. |
| 2564 | |
|
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|
2565 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
| 342 | 2566 |
| 2567 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
|
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|
2568 ExtendedOopClosure* _cl; |
| 342 | 2569 public: |
|
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|
2570 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
| 342 | 2571 bool doHeapRegion(HeapRegion* r) { |
|
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2572 if (!r->continuesHumongous()) { |
| 342 | 2573 r->oop_iterate(_cl); |
| 2574 } | |
| 2575 return false; | |
| 2576 } | |
| 2577 }; | |
| 2578 | |
|
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|
2579 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
|
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|
2580 IterateOopClosureRegionClosure blk(cl); |
| 3766 | 2581 heap_region_iterate(&blk); |
| 342 | 2582 } |
| 2583 | |
| 2584 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2585 | |
| 2586 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2587 ObjectClosure* _cl; | |
| 2588 public: | |
| 2589 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2590 bool doHeapRegion(HeapRegion* r) { | |
| 2591 if (! r->continuesHumongous()) { | |
| 2592 r->object_iterate(_cl); | |
| 2593 } | |
| 2594 return false; | |
| 2595 } | |
| 2596 }; | |
| 2597 | |
|
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|
2598 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2599 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2600 heap_region_iterate(&blk); |
| 342 | 2601 } |
| 2602 | |
| 2603 // Calls a SpaceClosure on a HeapRegion. | |
| 2604 | |
| 2605 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2606 SpaceClosure* _cl; | |
| 2607 public: | |
| 2608 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2609 bool doHeapRegion(HeapRegion* r) { | |
| 2610 _cl->do_space(r); | |
| 2611 return false; | |
| 2612 } | |
| 2613 }; | |
| 2614 | |
| 2615 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2616 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2617 heap_region_iterate(&blk); |
| 342 | 2618 } |
| 2619 | |
| 3766 | 2620 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
|
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|
2621 _hrm.iterate(cl); |
| 342 | 2622 } |
| 2623 | |
| 2624 void | |
| 2625 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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|
2626 uint worker_id, |
|
20336
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8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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diff
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|
2627 uint num_workers, |
|
6701abbc4441
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|
2628 jint claim_value) const { |
|
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|
2629 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
| 355 | 2630 } |
| 2631 | |
| 390 | 2632 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2633 public: | |
| 2634 bool doHeapRegion(HeapRegion* r) { | |
| 2635 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2636 return false; | |
| 2637 } | |
| 2638 }; | |
| 2639 | |
|
4783
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|
2640 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2641 ResetClaimValuesClosure blk; |
| 2642 heap_region_iterate(&blk); | |
| 2643 } | |
| 2644 | |
|
4783
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|
2645 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
023652e49ac0
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|
2646 ResetClaimValuesClosure blk; |
|
023652e49ac0
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|
2647 collection_set_iterate(&blk); |
|
023652e49ac0
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|
2648 } |
|
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|
2649 |
| 355 | 2650 #ifdef ASSERT |
| 2651 // This checks whether all regions in the heap have the correct claim | |
| 2652 // value. I also piggy-backed on this a check to ensure that the | |
| 2653 // humongous_start_region() information on "continues humongous" | |
| 2654 // regions is correct. | |
| 2655 | |
| 2656 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2657 private: | |
| 2658 jint _claim_value; | |
|
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|
2659 uint _failures; |
| 355 | 2660 HeapRegion* _sh_region; |
|
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|
2661 |
| 355 | 2662 public: |
| 2663 CheckClaimValuesClosure(jint claim_value) : | |
| 2664 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2665 bool doHeapRegion(HeapRegion* r) { | |
| 2666 if (r->claim_value() != _claim_value) { | |
|
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|
2667 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2668 "claim value = %d, should be %d", |
|
4097
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|
2669 HR_FORMAT_PARAMS(r), |
|
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|
2670 r->claim_value(), _claim_value); |
| 355 | 2671 ++_failures; |
| 2672 } | |
| 2673 if (!r->isHumongous()) { | |
| 2674 _sh_region = NULL; | |
| 2675 } else if (r->startsHumongous()) { | |
| 2676 _sh_region = r; | |
| 2677 } else if (r->continuesHumongous()) { | |
| 2678 if (r->humongous_start_region() != _sh_region) { | |
|
4097
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|
2679 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2680 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2681 HR_FORMAT_PARAMS(r), |
| 355 | 2682 r->humongous_start_region(), |
| 2683 _sh_region); | |
| 2684 ++_failures; | |
| 342 | 2685 } |
| 2686 } | |
| 355 | 2687 return false; |
| 2688 } | |
|
6010
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|
2689 uint failures() { return _failures; } |
| 355 | 2690 }; |
| 2691 | |
| 2692 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2693 CheckClaimValuesClosure cl(claim_value); | |
| 2694 heap_region_iterate(&cl); | |
| 2695 return cl.failures() == 0; | |
| 2696 } | |
|
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|
2697 |
|
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|
2698 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
6010
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|
2699 private: |
|
720b6a76dd9d
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|
2700 jint _claim_value; |
|
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|
2701 uint _failures; |
|
4097
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|
2702 |
|
dc467e8b2c5e
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|
2703 public: |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2704 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
6010
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|
2705 _claim_value(claim_value), _failures(0) { } |
|
720b6a76dd9d
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|
2706 |
|
720b6a76dd9d
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|
2707 uint failures() { return _failures; } |
|
4097
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|
2708 |
|
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|
2709 bool doHeapRegion(HeapRegion* hr) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2710 assert(hr->in_collection_set(), "how?"); |
|
dc467e8b2c5e
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|
2711 assert(!hr->isHumongous(), "H-region in CSet"); |
|
dc467e8b2c5e
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|
2712 if (hr->claim_value() != _claim_value) { |
|
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|
2713 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
dc467e8b2c5e
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|
2714 "claim value = %d, should be %d", |
|
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|
2715 HR_FORMAT_PARAMS(hr), |
|
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|
2716 hr->claim_value(), _claim_value); |
|
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|
2717 _failures += 1; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2718 } |
|
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|
2719 return false; |
|
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|
2720 } |
|
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|
2721 }; |
|
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|
2722 |
|
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|
2723 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
dc467e8b2c5e
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|
2724 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2725 collection_set_iterate(&cl); |
|
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|
2726 return cl.failures() == 0; |
|
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|
2727 } |
| 355 | 2728 #endif // ASSERT |
| 342 | 2729 |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2730 // Clear the cached CSet starting regions and (more importantly) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2731 // the time stamps. Called when we reset the GC time stamp. |
|
fd2b426c30db
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diff
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|
2732 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2733 assert(_worker_cset_start_region != NULL, "sanity"); |
|
fd2b426c30db
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changeset
|
2734 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2735 |
|
fd2b426c30db
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diff
changeset
|
2736 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
fd2b426c30db
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changeset
|
2737 for (int i = 0; i < n_queues; i++) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2738 _worker_cset_start_region[i] = NULL; |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2739 _worker_cset_start_region_time_stamp[i] = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2740 } |
|
fd2b426c30db
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diff
changeset
|
2741 } |
|
fd2b426c30db
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changeset
|
2742 |
|
fd2b426c30db
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diff
changeset
|
2743 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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diff
changeset
|
2744 // starting region for iterating over the current collection set. |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2745 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2746 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2747 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2748 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2749 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2750 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2751 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2752 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2753 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2754 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2755 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2756 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2757 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2758 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2759 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2760 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2761 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2762 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2763 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2764 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2765 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2766 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2767 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2768 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2769 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2770 // Then thread t will start at region floor ((t * n) / p) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2771 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2772 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2773 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2774 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2775 uint active_workers = workers()->active_workers(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2776 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2777 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2778 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2779 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2780 uint end_ind = (cs_size * worker_i) / active_workers; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2781 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2782 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2783 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2784 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2785 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2786 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2787 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2788 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2789 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2790 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2791 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2792 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2793 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2794 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2795 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2796 // Note: the calculated starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2797 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2798 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2799 assert(_worker_cset_start_region_time_stamp[worker_i] != gc_time_stamp, |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2800 "should be updated only once per pause"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2801 _worker_cset_start_region[worker_i] = result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2802 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2803 _worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2804 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2805 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2806 |
| 342 | 2807 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2808 HeapRegion* r = g1_policy()->collection_set(); | |
| 2809 while (r != NULL) { | |
| 2810 HeapRegion* next = r->next_in_collection_set(); | |
| 2811 if (cl->doHeapRegion(r)) { | |
| 2812 cl->incomplete(); | |
| 2813 return; | |
| 2814 } | |
| 2815 r = next; | |
| 2816 } | |
| 2817 } | |
| 2818 | |
| 2819 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2820 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2821 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2822 // The CSet is empty so there's nothing to do. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2823 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2824 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2825 |
| 342 | 2826 assert(r->in_collection_set(), |
| 2827 "Start region must be a member of the collection set."); | |
| 2828 HeapRegion* cur = r; | |
| 2829 while (cur != NULL) { | |
| 2830 HeapRegion* next = cur->next_in_collection_set(); | |
| 2831 if (cl->doHeapRegion(cur) && false) { | |
| 2832 cl->incomplete(); | |
| 2833 return; | |
| 2834 } | |
| 2835 cur = next; | |
| 2836 } | |
| 2837 cur = g1_policy()->collection_set(); | |
| 2838 while (cur != r) { | |
| 2839 HeapRegion* next = cur->next_in_collection_set(); | |
| 2840 if (cl->doHeapRegion(cur) && false) { | |
| 2841 cl->incomplete(); | |
| 2842 return; | |
| 2843 } | |
| 2844 cur = next; | |
| 2845 } | |
| 2846 } | |
| 2847 | |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2848 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2849 HeapRegion* result = _hrm.next_region_in_heap(from); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2850 while (result != NULL && result->isHumongous()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2851 result = _hrm.next_region_in_heap(result); |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2852 } |
|
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2853 return result; |
|
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2854 } |
| 342 | 2855 |
| 2856 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2857 return heap_region_containing(addr); |
| 342 | 2858 } |
| 2859 | |
| 2860 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2861 Space* sp = space_containing(addr); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2862 return sp->block_start(addr); |
| 342 | 2863 } |
| 2864 | |
| 2865 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2866 Space* sp = space_containing(addr); | |
| 2867 return sp->block_size(addr); | |
| 2868 } | |
| 2869 | |
| 2870 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2871 Space* sp = space_containing(addr); | |
| 2872 return sp->block_is_obj(addr); | |
| 2873 } | |
| 2874 | |
| 2875 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2876 return true; | |
| 2877 } | |
| 2878 | |
| 2879 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2880 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2881 } | |
| 2882 | |
| 2883 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2884 return young_list()->eden_used_bytes(); | |
| 2885 } | |
| 2886 | |
| 2887 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 2888 // must be smaller than the humongous object limit. | |
| 2889 size_t G1CollectedHeap::max_tlab_size() const { | |
| 2890 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 2891 } |
| 2892 | |
| 2893 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2894 // Return the remaining space in the cur alloc region, but not less than | |
| 2895 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2896 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2897 // Also, this value can be at most the humongous object threshold, |
| 10405 | 2898 // since we can't allow tlabs to grow big enough to accommodate |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2899 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2900 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2901 HeapRegion* hr = _allocator->mutator_alloc_region(AllocationContext::current())->get(); |
| 17727 | 2902 size_t max_tlab = max_tlab_size() * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2903 if (hr == NULL) { |
| 17727 | 2904 return max_tlab; |
| 342 | 2905 } else { |
| 17727 | 2906 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 2907 } |
| 2908 } | |
| 2909 | |
| 2910 size_t G1CollectedHeap::max_capacity() const { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2911 return _hrm.reserved().byte_size(); |
| 342 | 2912 } |
| 2913 | |
| 2914 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2915 // assert(false, "NYI"); | |
| 2916 return 0; | |
| 2917 } | |
| 2918 | |
| 2919 void G1CollectedHeap::prepare_for_verify() { | |
| 2920 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2921 ensure_parsability(false); | |
| 2922 } | |
| 2923 g1_rem_set()->prepare_for_verify(); | |
| 2924 } | |
| 2925 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2926 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2927 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2928 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 case VerifyOption_G1UseMarkWord: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 default: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2936 ShouldNotReachHere(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2938 return false; // keep some compilers happy |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
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2939 } |
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2940 |
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2941 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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2942 switch (vo) { |
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2943 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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2944 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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2945 case VerifyOption_G1UseMarkWord: return NULL; |
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2946 default: ShouldNotReachHere(); |
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2947 } |
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2948 return NULL; // keep some compilers happy |
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2949 } |
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2950 |
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2951 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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2952 switch (vo) { |
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2953 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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2954 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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2955 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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2956 default: ShouldNotReachHere(); |
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2957 } |
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2958 return false; // keep some compilers happy |
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2959 } |
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2960 |
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2961 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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2962 switch (vo) { |
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2963 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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2964 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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2965 case VerifyOption_G1UseMarkWord: return "NONE"; |
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2966 default: ShouldNotReachHere(); |
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2967 } |
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2968 return NULL; // keep some compilers happy |
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2969 } |
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2970 |
|
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|
2971 class VerifyRootsClosure: public OopClosure { |
| 12080 | 2972 private: |
| 2973 G1CollectedHeap* _g1h; | |
| 2974 VerifyOption _vo; | |
| 2975 bool _failures; | |
| 2976 public: | |
| 2977 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 2978 // _vo == UseNextMarking -> use "next" marking information, | |
| 2979 // _vo == UseMarkWord -> use mark word from object header. | |
| 2980 VerifyRootsClosure(VerifyOption vo) : | |
| 2981 _g1h(G1CollectedHeap::heap()), | |
| 2982 _vo(vo), | |
| 2983 _failures(false) { } | |
| 2984 | |
| 2985 bool failures() { return _failures; } | |
| 2986 | |
| 2987 template <class T> void do_oop_nv(T* p) { | |
| 2988 T heap_oop = oopDesc::load_heap_oop(p); | |
| 2989 if (!oopDesc::is_null(heap_oop)) { | |
| 2990 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 2991 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 2992 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 2993 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 2994 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 2995 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 2996 } | |
| 2997 obj->print_on(gclog_or_tty); | |
| 2998 _failures = true; | |
| 2999 } | |
| 3000 } | |
| 3001 } | |
| 3002 | |
| 3003 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3004 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3005 }; | |
| 3006 | |
|
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3007 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3008 G1CollectedHeap* _g1h; |
| 3009 OopClosure* _root_cl; | |
| 3010 nmethod* _nm; | |
| 3011 VerifyOption _vo; | |
| 3012 bool _failures; | |
| 3013 | |
| 3014 template <class T> void do_oop_work(T* p) { | |
| 3015 // First verify that this root is live | |
| 3016 _root_cl->do_oop(p); | |
| 3017 | |
| 3018 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3019 // We're not verifying the code roots attached to heap region. | |
| 3020 return; | |
| 3021 } | |
| 3022 | |
| 3023 // Don't check the code roots during marking verification in a full GC | |
| 3024 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3025 return; | |
| 3026 } | |
| 3027 | |
| 3028 // Now verify that the current nmethod (which contains p) is | |
| 3029 // in the code root list of the heap region containing the | |
| 3030 // object referenced by p. | |
| 3031 | |
| 3032 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3033 if (!oopDesc::is_null(heap_oop)) { | |
| 3034 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3035 | |
| 3036 // Now fetch the region containing the object | |
| 3037 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3038 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3039 // Verify that the strong code root list for this region | |
| 3040 // contains the nmethod | |
| 3041 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3042 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3043 "from nmethod "PTR_FORMAT" not in strong " | |
| 3044 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3045 p, _nm, hr->bottom(), hr->end()); | |
| 3046 _failures = true; | |
| 3047 } | |
| 3048 } | |
| 3049 } | |
| 3050 | |
| 3051 public: | |
| 3052 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3053 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3054 | |
| 3055 void do_oop(oop* p) { do_oop_work(p); } | |
| 3056 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3057 | |
| 3058 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3059 bool failures() { return _failures; } | |
| 3060 }; | |
| 3061 | |
| 3062 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3063 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3064 | |
| 3065 public: | |
| 3066 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3067 _oop_cl(oop_cl) {} | |
| 3068 | |
| 3069 void do_code_blob(CodeBlob* cb) { | |
| 3070 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3071 if (nm != NULL) { | |
| 3072 _oop_cl->set_nmethod(nm); | |
| 3073 nm->oops_do(_oop_cl); | |
| 3074 } | |
| 3075 } | |
| 3076 }; | |
| 3077 | |
| 3078 class YoungRefCounterClosure : public OopClosure { | |
| 3079 G1CollectedHeap* _g1h; | |
| 3080 int _count; | |
| 3081 public: | |
| 3082 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3083 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3084 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3085 | |
| 3086 int count() { return _count; } | |
| 3087 void reset_count() { _count = 0; }; | |
| 3088 }; | |
| 3089 | |
| 3090 class VerifyKlassClosure: public KlassClosure { | |
| 3091 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3092 OopClosure *_oop_closure; | |
| 3093 public: | |
| 3094 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3095 void do_klass(Klass* k) { | |
| 3096 k->oops_do(_oop_closure); | |
| 3097 | |
| 3098 _young_ref_counter_closure.reset_count(); | |
| 3099 k->oops_do(&_young_ref_counter_closure); | |
| 3100 if (_young_ref_counter_closure.count() > 0) { | |
| 3101 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3102 } | |
| 3103 } | |
| 3104 }; | |
| 3105 | |
| 342 | 3106 class VerifyLivenessOopClosure: public OopClosure { |
|
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3107 G1CollectedHeap* _g1h; |
|
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|
3108 VerifyOption _vo; |
| 342 | 3109 public: |
|
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|
3110 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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|
3111 _g1h(g1h), _vo(vo) |
|
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|
3112 { } |
|
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|
3113 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
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|
3114 void do_oop( oop *p) { do_oop_work(p); } |
|
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|
3115 |
|
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|
3116 template <class T> void do_oop_work(T *p) { |
|
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|
3117 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
3118 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
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|
3119 "Dead object referenced by a not dead object"); |
| 342 | 3120 } |
| 3121 }; | |
| 3122 | |
| 3123 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3124 private: |
| 342 | 3125 G1CollectedHeap* _g1h; |
| 3126 size_t _live_bytes; | |
| 3127 HeapRegion *_hr; | |
|
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|
3128 VerifyOption _vo; |
| 342 | 3129 public: |
|
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|
3130 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3131 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3132 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3133 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
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|
3134 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3135 _g1h = G1CollectedHeap::heap(); |
| 3136 } | |
| 3137 void do_object(oop o) { | |
|
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|
3138 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3139 assert(o != NULL, "Huh?"); |
|
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|
3140 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3141 // If the object is alive according to the mark word, |
|
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|
3142 // then verify that the marking information agrees. |
|
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|
3143 // Note we can't verify the contra-positive of the |
|
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|
3144 // above: if the object is dead (according to the mark |
|
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|
3145 // word), it may not be marked, or may have been marked |
|
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|
3146 // but has since became dead, or may have been allocated |
|
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|
3147 // since the last marking. |
|
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|
3148 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3149 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3150 } |
|
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|
3151 |
|
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|
3152 o->oop_iterate_no_header(&isLive); |
|
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|
3153 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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|
3154 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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|
3155 _live_bytes += (obj_size * HeapWordSize); |
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|
3156 } |
| 342 | 3157 } |
| 3158 } | |
| 3159 size_t live_bytes() { return _live_bytes; } | |
| 3160 }; | |
| 3161 | |
| 3162 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3163 HeapRegion *_hr; | |
| 3164 G1CollectedHeap *_g1; | |
| 3165 public: | |
| 3166 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3167 _g1 = G1CollectedHeap::heap(); | |
| 3168 }; | |
| 3169 | |
| 3170 void do_object(oop o) { | |
| 3171 if (o != NULL) { | |
| 3172 HeapWord *start = (HeapWord *) o; | |
| 3173 size_t word_sz = o->size(); | |
| 3174 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3175 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3176 (void*) o, word_sz, | |
| 3177 _g1->isMarkedPrev(o), | |
| 3178 _g1->isMarkedNext(o), | |
| 3179 _hr->obj_allocated_since_prev_marking(o)); | |
| 3180 HeapWord *end = start + word_sz; | |
| 3181 HeapWord *cur; | |
| 3182 int *val; | |
| 3183 for (cur = start; cur < end; cur++) { | |
| 3184 val = (int *) cur; | |
| 3185 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3186 } | |
| 3187 } | |
| 3188 } | |
| 3189 }; | |
| 3190 | |
| 3191 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3192 private: |
|
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|
3193 bool _par; |
|
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|
3194 VerifyOption _vo; |
|
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|
3195 bool _failures; |
| 811 | 3196 public: |
|
3772
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diff
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|
3197 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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diff
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|
3198 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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diff
changeset
|
3199 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3200 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3201 : _par(par), | |
|
3772
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7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3202 _vo(vo), |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3203 _failures(false) {} |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3204 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3205 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3206 return _failures; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3207 } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
3208 |
| 342 | 3209 bool doHeapRegion(HeapRegion* r) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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parents:
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diff
changeset
|
3210 if (!r->continuesHumongous()) { |
|
1020
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1019
diff
changeset
|
3211 bool failures = false; |
| 6008 | 3212 r->verify(_vo, &failures); |
|
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diff
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|
3213 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3214 _failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
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diff
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|
3215 } else { |
|
3772
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|
3216 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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diff
changeset
|
3217 r->object_iterate(¬_dead_yet_cl); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3218 if (_vo != VerifyOption_G1UseNextMarking) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3219 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3220 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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diff
changeset
|
3221 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3222 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3223 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
3224 r->max_live_bytes(), |
|
1020
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changeset
|
3225 not_dead_yet_cl.live_bytes()); |
|
4787
2ace1c4ee8da
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parents:
4785
diff
changeset
|
3226 _failures = true; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
3227 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
3228 } else { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3229 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3230 // check on the live bytes as the calculation has not been |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3231 // finalized yet. |
|
1020
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|
3232 } |
|
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|
3233 } |
| 342 | 3234 } |
|
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diff
changeset
|
3235 return false; // stop the region iteration if we hit a failure |
| 342 | 3236 } |
| 3237 }; | |
| 3238 | |
| 12080 | 3239 // This is the task used for parallel verification of the heap regions |
| 390 | 3240 |
| 3241 class G1ParVerifyTask: public AbstractGangTask { | |
| 3242 private: | |
| 3243 G1CollectedHeap* _g1h; | |
|
3772
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diff
changeset
|
3244 VerifyOption _vo; |
|
6747fd0512e0
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diff
changeset
|
3245 bool _failures; |
| 390 | 3246 |
| 3247 public: | |
|
3772
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diff
changeset
|
3248 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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diff
changeset
|
3249 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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changeset
|
3250 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3251 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3252 AbstractGangTask("Parallel verify task"), |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3253 _g1h(g1h), |
|
3772
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changeset
|
3254 _vo(vo), |
|
1020
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diff
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|
3255 _failures(false) { } |
|
ff2402f6a50b
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|
3256 |
|
ff2402f6a50b
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diff
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|
3257 bool failures() { |
|
ff2402f6a50b
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diff
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|
3258 return _failures; |
|
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diff
changeset
|
3259 } |
| 390 | 3260 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3261 void work(uint worker_id) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3262 HandleMark hm; |
| 6008 | 3263 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3264 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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4090
diff
changeset
|
3265 _g1h->workers()->active_workers(), |
| 390 | 3266 HeapRegion::ParVerifyClaimValue); |
|
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changeset
|
3267 if (blk.failures()) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3268 _failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3269 } |
| 390 | 3270 } |
| 3271 }; | |
| 3272 | |
| 12080 | 3273 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3274 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3275 assert(Thread::current()->is_VM_thread(), |
| 3276 "Expected to be executed serially by the VM thread at this point"); | |
| 3277 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3278 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
6747fd0512e0
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johnc
parents:
3766
diff
changeset
|
3279 VerifyRootsClosure rootsCl(vo); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
3280 VerifyKlassClosure klassCl(this, &rootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3281 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
|
3772
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diff
changeset
|
3282 |
|
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3283 // We apply the relevant closures to all the oops in the |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3284 // system dictionary, class loader data graph, the string table |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3285 // and the nmethods in the code cache. |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3286 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
|
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3287 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3288 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3289 process_all_roots(true, // activate StrongRootsScope |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3290 SO_AllCodeCache, // roots scanning options |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3291 &rootsCl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3292 &cldCl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3293 &blobsCl); |
|
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3294 |
| 12080 | 3295 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3296 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3297 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3298 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3299 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3300 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3301 // the region sets when not in a full GC. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3302 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3303 verify_region_sets(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3304 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3305 |
| 2152 | 3306 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3307 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3308 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3309 "sanity check"); | |
| 3310 | |
| 6008 | 3311 G1ParVerifyTask task(this, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3312 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3313 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3314 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
3315 int n_workers = workers()->active_workers(); |
| 390 | 3316 set_par_threads(n_workers); |
| 3317 workers()->run_task(&task); | |
| 3318 set_par_threads(0); | |
|
1020
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1019
diff
changeset
|
3319 if (task.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3320 failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3321 } |
| 390 | 3322 |
|
4095
bca17e38de00
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jmasa
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4090
diff
changeset
|
3323 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3324 // The implication is that n_workers is > 0. |
| 390 | 3325 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3326 "sanity check"); | |
| 3327 | |
| 3328 reset_heap_region_claim_values(); | |
| 3329 | |
| 3330 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3331 "sanity check"); | |
| 3332 } else { | |
| 6008 | 3333 VerifyRegionClosure blk(false, vo); |
| 3766 | 3334 heap_region_iterate(&blk); |
|
1020
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1019
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changeset
|
3335 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3336 failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3337 } |
| 390 | 3338 } |
| 2152 | 3339 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3340 rem_set()->verify(); |
|
1020
ff2402f6a50b
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1019
diff
changeset
|
3341 |
| 17764 | 3342 if (G1StringDedup::is_enabled()) { |
| 3343 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3344 G1StringDedup::verify(); | |
| 3345 } | |
| 3346 | |
|
1020
ff2402f6a50b
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1019
diff
changeset
|
3347 if (failures) { |
|
ff2402f6a50b
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parents:
1019
diff
changeset
|
3348 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3349 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3350 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3351 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3352 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3353 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3354 #ifndef PRODUCT |
| 1044 | 3355 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3356 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
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3766
diff
changeset
|
3357 vo, false /* all */); |
|
1020
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1019
diff
changeset
|
3358 } |
|
1547
fb1a39993f69
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jcoomes
parents:
1545
diff
changeset
|
3359 #endif |
|
1020
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parents:
1019
diff
changeset
|
3360 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3361 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3362 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3363 } else { |
| 17764 | 3364 if (!silent) { |
| 3365 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3366 if (G1StringDedup::is_enabled()) { | |
| 3367 gclog_or_tty->print(", StrDedup"); | |
| 3368 } | |
| 3369 gclog_or_tty->print(") "); | |
| 3370 } | |
| 342 | 3371 } |
| 3372 } | |
| 3373 | |
| 12080 | 3374 void G1CollectedHeap::verify(bool silent) { |
| 3375 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3376 } | |
| 3377 | |
| 3378 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3379 double verify_time_ms = 0.0; | |
| 3380 | |
| 3381 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3382 double verify_start = os::elapsedTime(); | |
| 3383 HandleMark hm; // Discard invalid handles created during verification | |
| 3384 prepare_for_verify(); | |
| 3385 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3386 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3387 } | |
| 3388 | |
| 3389 return verify_time_ms; | |
| 3390 } | |
| 3391 | |
| 3392 void G1CollectedHeap::verify_before_gc() { | |
| 3393 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3394 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3395 } | |
| 3396 | |
| 3397 void G1CollectedHeap::verify_after_gc() { | |
| 3398 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3399 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3400 } | |
| 3401 | |
| 342 | 3402 class PrintRegionClosure: public HeapRegionClosure { |
| 3403 outputStream* _st; | |
| 3404 public: | |
| 3405 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3406 bool doHeapRegion(HeapRegion* r) { | |
| 3407 r->print_on(_st); | |
| 3408 return false; | |
| 3409 } | |
| 3410 }; | |
| 3411 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3412 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3413 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3414 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3415 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3416 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3417 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3418 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3419 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3420 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3421 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3422 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3423 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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17774
diff
changeset
|
3424 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3425 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3426 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3427 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3428 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3429 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3430 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3431 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3432 return false; // keep some compilers happy |
|
bfdf528be8e8
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tschatzl
parents:
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diff
changeset
|
3433 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3434 |
| 342 | 3435 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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diff
changeset
|
3436 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3437 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3438 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3439 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3440 _hrm.reserved().start(), |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3441 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3442 _hrm.reserved().end()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3443 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3444 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3445 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3446 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3447 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3448 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3449 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3450 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3451 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3452 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3453 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3454 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3455 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3456 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3457 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3458 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3459 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3460 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3461 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3462 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3463 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3464 "NTAMS=next top-at-mark-start)"); |
| 342 | 3465 PrintRegionClosure blk(st); |
| 3766 | 3466 heap_region_iterate(&blk); |
| 342 | 3467 } |
| 3468 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3469 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3470 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3471 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3472 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3473 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3474 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3475 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3476 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3477 |
| 342 | 3478 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3479 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3480 workers()->print_worker_threads_on(st); |
| 3481 } | |
| 3482 _cmThread->print_on(st); | |
| 342 | 3483 st->cr(); |
| 1019 | 3484 _cm->print_worker_threads_on(st); |
| 3485 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3486 if (G1StringDedup::is_enabled()) { |
| 3487 G1StringDedup::print_worker_threads_on(st); | |
| 3488 } | |
| 342 | 3489 } |
| 3490 | |
| 3491 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3492 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3493 workers()->threads_do(tc); |
| 3494 } | |
| 3495 tc->do_thread(_cmThread); | |
| 794 | 3496 _cg1r->threads_do(tc); |
| 17764 | 3497 if (G1StringDedup::is_enabled()) { |
| 3498 G1StringDedup::threads_do(tc); | |
| 3499 } | |
| 342 | 3500 } |
| 3501 | |
| 3502 void G1CollectedHeap::print_tracing_info() const { | |
| 3503 // We'll overload this to mean "trace GC pause statistics." | |
| 3504 if (TraceGen0Time || TraceGen1Time) { | |
| 3505 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3506 // to that. | |
| 3507 g1_policy()->print_tracing_info(); | |
| 3508 } | |
| 751 | 3509 if (G1SummarizeRSetStats) { |
| 342 | 3510 g1_rem_set()->print_summary_info(); |
| 3511 } | |
| 1282 | 3512 if (G1SummarizeConcMark) { |
| 342 | 3513 concurrent_mark()->print_summary_info(); |
| 3514 } | |
| 3515 g1_policy()->print_yg_surv_rate_info(); | |
| 3516 SpecializationStats::print(); | |
| 3517 } | |
| 3518 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3519 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3520 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3521 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3522 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3523 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3524 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3525 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3526 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3527 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3528 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3529 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3530 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3531 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3532 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3533 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3534 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3535 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3542 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3543 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3547 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3548 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3549 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3550 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3551 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3553 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3554 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3556 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3557 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3558 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3562 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3563 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3564 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3565 heap_region_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3566 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3567 #endif // PRODUCT |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3568 |
| 342 | 3569 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3570 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3571 "not a garbage-first heap"); | |
| 3572 return _g1h; | |
| 3573 } | |
| 3574 | |
| 3575 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3576 // always_do_update_barrier = false; |
| 342 | 3577 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3578 // Fill TLAB's and such | |
| 17727 | 3579 accumulate_statistics_all_tlabs(); |
| 342 | 3580 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3581 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3582 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3583 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3584 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3585 } |
| 342 | 3586 } |
| 3587 | |
| 3588 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3589 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3590 if (G1SummarizeRSetStats && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3591 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3592 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3593 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3594 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3595 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3596 |
| 342 | 3597 // FIXME: what is this about? |
| 3598 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3599 // is set. | |
| 3600 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3601 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3602 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3603 |
| 17727 | 3604 resize_all_tlabs(); |
| 3605 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3606 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3607 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3608 Universe::update_heap_info_at_gc(); |
| 342 | 3609 } |
| 3610 | |
| 1973 | 3611 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3612 unsigned int gc_count_before, | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3613 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3614 GCCause::Cause gc_cause) { |
| 1973 | 3615 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3616 g1_policy()->record_stop_world_start(); |
| 1973 | 3617 VM_G1IncCollectionPause op(gc_count_before, |
| 3618 word_size, | |
| 3619 false, /* should_initiate_conc_mark */ | |
| 3620 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3621 gc_cause); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3622 |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3623 op.set_allocation_context(AllocationContext::current()); |
| 1973 | 3624 VMThread::execute(&op); |
| 3625 | |
| 3626 HeapWord* result = op.result(); | |
| 3627 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3628 assert(result == NULL || ret_succeeded, | |
| 3629 "the result should be NULL if the VM did not succeed"); | |
| 3630 *succeeded = ret_succeeded; | |
| 3631 | |
| 3632 assert_heap_not_locked(); | |
| 3633 return result; | |
| 342 | 3634 } |
| 3635 | |
| 3636 void | |
| 3637 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3638 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3639 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3640 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3641 CGC_lock->notify(); |
| 342 | 3642 } |
| 3643 } | |
| 3644 | |
| 3645 size_t G1CollectedHeap::pending_card_num() { | |
| 3646 size_t extra_cards = 0; | |
| 3647 JavaThread *curr = Threads::first(); | |
| 3648 while (curr != NULL) { | |
| 3649 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3650 extra_cards += dcq.size(); | |
| 3651 curr = curr->next(); | |
| 3652 } | |
| 3653 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3654 size_t buffer_size = dcqs.buffer_size(); | |
| 3655 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3656 |
| 3657 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3658 // in bytes - not the number of 'entries'. We need to convert | |
| 3659 // into a number of cards. | |
| 3660 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3661 } |
| 3662 | |
| 3663 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3664 return g1_rem_set()->cardsScanned(); |
| 342 | 3665 } |
| 3666 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3667 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3668 HeapRegion* region = region_at(index); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3669 assert(region->startsHumongous(), "Must start a humongous object"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3670 return oop(region->bottom())->is_objArray() || !region->rem_set()->is_empty(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3671 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3672 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3673 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3674 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3675 size_t _total_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3676 size_t _candidate_humongous; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3677 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3678 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3679 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3680 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3681 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3682 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3683 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3684 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3685 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3686 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3687 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3688 bool is_candidate = !g1h->humongous_region_is_always_live(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3689 // Is_candidate already filters out humongous regions with some remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3690 // This will not lead to humongous object that we mistakenly keep alive because |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3691 // during young collection the remembered sets will only be added to. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3692 if (is_candidate) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3693 g1h->register_humongous_region_with_in_cset_fast_test(region_idx); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3694 _candidate_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3695 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3696 _total_humongous++; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3697 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3698 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3699 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3700 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3701 size_t total_humongous() const { return _total_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3702 size_t candidate_humongous() const { return _candidate_humongous; } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3703 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3704 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3705 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3706 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3707 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3708 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3709 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3710 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3711 RegisterHumongousWithInCSetFastTestClosure cl; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3712 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3713 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(cl.total_humongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3714 cl.candidate_humongous()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3715 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3716 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3717 if (_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3718 clear_humongous_is_live_table(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3719 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3720 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3721 |
| 342 | 3722 void |
| 3723 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3724 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3725 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3726 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3727 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3728 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3729 "Not enough space for young surv words summary."); |
| 3730 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3731 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3732 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3733 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3734 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3735 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3736 #endif // !ASSERT |
| 342 | 3737 } |
| 3738 | |
| 3739 void | |
| 3740 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3741 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3742 uint array_length = g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3743 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3744 _surviving_young_words[i] += surv_young_words[i]; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3745 } |
| 342 | 3746 } |
| 3747 | |
| 3748 void | |
| 3749 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3750 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3751 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3752 _surviving_young_words = NULL; |
| 3753 } | |
| 3754 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3755 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3756 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3757 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3758 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 // Here we check that the CSet region's RSet is ready for parallel |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3760 // iteration. The fields that we'll verify are only manipulated |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3761 // when the region is part of a CSet and is collected. Afterwards, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3762 // we reset these fields when we clear the region's RSet (when the |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3763 // region is freed) so they are ready when the region is |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3764 // re-allocated. The only exception to this is if there's an |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3765 // evacuation failure and instead of freeing the region we leave |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3766 // it in the heap. In that case, we reset these fields during |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3767 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3768 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3769 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3770 // Here's a good place to add any other checks we'd like to |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3771 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3772 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3773 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3774 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3775 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3776 |
| 1709 | 3777 #if TASKQUEUE_STATS |
| 3778 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3779 st->print_raw_cr("GC Task Stats"); | |
| 3780 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3781 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3782 } | |
| 3783 | |
| 3784 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3785 print_taskqueue_stats_hdr(st); | |
| 3786 | |
| 3787 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3788 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3789 for (int i = 0; i < n; ++i) { |
| 3790 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3791 totals += task_queue(i)->stats; | |
| 3792 } | |
| 3793 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3794 | |
| 3795 DEBUG_ONLY(totals.verify()); | |
| 3796 } | |
| 3797 | |
| 3798 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3799 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3800 for (int i = 0; i < n; ++i) { |
| 3801 task_queue(i)->stats.reset(); | |
| 3802 } | |
| 3803 } | |
| 3804 #endif // TASKQUEUE_STATS | |
| 3805 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3806 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3807 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3808 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3809 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3810 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3811 gclog_or_tty->gclog_stamp(_gc_tracer_stw->gc_id()); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3812 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3813 GCCauseString gc_cause_str = GCCauseString("GC pause", gc_cause()) |
|
7455
0b54ffe4c2d3
8005672: Clean up some changes to GC logging with GCCause's
jmasa
parents:
7397
diff
changeset
|
3814 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3815 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3816 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3817 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3818 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3819 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3820 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3821 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3822 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3823 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3824 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3825 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3826 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3827 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3828 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3829 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3830 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3831 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3832 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3833 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3834 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3835 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3836 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3837 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3838 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3839 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3840 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3841 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3842 |
| 1973 | 3843 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3844 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3845 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3846 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3847 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3848 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3849 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3850 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3851 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3852 _gc_timer_stw->register_gc_start(); |
| 10405 | 3853 |
| 3854 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3855 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3856 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3857 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3858 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3859 print_heap_before_gc(); |
| 10405 | 3860 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3861 |
| 2152 | 3862 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3863 verify_dirty_young_regions(); |
| 2152 | 3864 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3865 // This call will decide whether this pause is an initial-mark |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3866 // pause. If it is, during_initial_mark_pause() will return true |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3867 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3868 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3869 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3870 // We do not allow initial-mark to be piggy-backed on a mixed GC. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3871 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3872 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3873 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3874 // We also do not allow mixed GCs during marking. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3875 assert(!mark_in_progress() || g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3876 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3877 // Record whether this pause is an initial mark. When the current |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3878 // thread has completed its logging output and it's safe to signal |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3879 // the CM thread, the flag's value in the policy has been reset. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3880 bool should_start_conc_mark = g1_policy()->during_initial_mark_pause(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3881 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3882 // Inner scope for scope based logging, timers, and stats collection |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3883 { |
| 10405 | 3884 EvacuationInfo evacuation_info; |
| 3885 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3886 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3887 // We are about to start a marking cycle, so we increment the |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3888 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3889 increment_old_marking_cycles_started(); |
| 10405 | 3890 register_concurrent_cycle_start(_gc_timer_stw->gc_start()); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3891 } |
| 10405 | 3892 |
| 3893 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3894 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3895 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3896 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3897 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3898 workers()->active_workers() : 1); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3899 double pause_start_sec = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3900 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3902 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3903 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3904 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3905 |
| 2361 | 3906 // If the secondary_free_list is not empty, append it to the |
| 3907 // free_list. No need to wait for the cleanup operation to finish; | |
| 3908 // the region allocation code will check the secondary_free_list | |
| 3909 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3910 // set, skip this step so that the region allocation code has to | |
| 3911 // get entries from the secondary_free_list. | |
| 2152 | 3912 if (!G1StressConcRegionFreeing) { |
| 2361 | 3913 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3914 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3915 |
| 12080 | 3916 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3917 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3918 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3919 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3920 // Don't dynamically change the number of GC threads this early. A value of |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3921 // 0 is used to indicate serial work. When parallel work is done, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3922 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3923 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3924 { // Call to jvmpi::post_class_unload_events must occur outside of active GC |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3925 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3926 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3927 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 increment_total_collections(false /* full gc */); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
3929 increment_gc_time_stamp(); |
| 342 | 3930 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3931 verify_before_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
3932 check_bitmaps("GC Start"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3933 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3934 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3935 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 // Forget the current alloc region (we might even choose it to be part |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 // of the collection set!). |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3953 _allocator->release_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3955 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3960 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3961 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3962 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3963 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3964 // Preserving the old comment here if that helps the investigation: |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3965 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 // the possible verification above. |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3968 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3969 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3970 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3974 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3975 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3976 g1_policy()->record_collection_pause_start(sample_start_time_sec); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3977 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3978 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3979 // We have to wait until the CM threads finish scanning the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3980 // root regions as it's the only way to ensure that all the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3981 // objects on them have been correctly scanned before we start |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3982 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3983 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3984 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3985 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3986 double scan_wait_end = os::elapsedTime(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3987 wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3988 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3989 g1_policy()->phase_times()->record_root_region_scan_wait_time(wait_time_ms); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3990 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3991 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3994 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3995 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4000 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4004 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4005 |
| 10405 | 4006 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4008 register_humongous_regions_with_in_cset_fast_test(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4009 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4010 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4011 // We should not verify the per-thread SATB buffers given that |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4012 // we have not filtered them yet (we'll do so during the |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
4013 // GC). We also call this after finalize_cset() to |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4014 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4015 _cm->verify_no_cset_oops(true /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4016 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4017 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4018 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4019 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4033 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4034 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4036 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4039 #endif // ASSERT |
| 1707 | 4040 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4043 // Initialize the GC alloc regions. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4044 _allocator->init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4045 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 // Actually do the work... |
| 10405 | 4047 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4049 // We do this to mainly verify the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 // (which have been filtered by now) since we didn't verify |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 // them earlier. No point in re-checking the stacks / enqueued |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 // buffers given that the CSet has not changed since last time |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4053 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4054 _cm->verify_no_cset_oops(false /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4055 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4056 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4057 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4058 |
| 10405 | 4059 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4060 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4061 eagerly_reclaim_humongous_regions(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4062 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 "young list should be empty"); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4080 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4081 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4084 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4085 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4087 _young_list->first_survivor_region(), |
| 4088 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 if (evacuation_failed()) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4093 _allocator->set_used(recalculate_used()); |
| 10405 | 4094 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4095 for (uint i = 0; i < n_queues; i++) { | |
| 4096 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4097 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4098 } | |
| 4099 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 // when they were freed. Add in the bytes evacuated. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4103 _allocator->increase_used(g1_policy()->bytes_copied_during_gc()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4107 // We have to do this before we notify the CM threads that |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4108 // they can start working to make sure that all the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4109 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4112 // Note that we don't actually trigger the CM thread at |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4113 // this point. We do that later when we're sure that |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4114 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4118 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4119 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4123 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4124 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4125 _allocator->init_mutator_alloc_region(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 size_t bytes_before = capacity(); |
| 4785 | 4131 // No need for an ergo verbose message here, |
| 4132 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 if (!expand(expand_bytes)) { |
|
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4134 // We failed to expand the heap. Cannot do anything about it. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4136 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4137 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 |
| 10405 | 4139 // We redo the verification but now wrt to the new CSet which |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4140 // has just got initialized after the previous CSet was freed. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4141 _cm->verify_no_cset_oops(true /* verify_stacks */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4142 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4143 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4144 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4145 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4146 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4147 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4148 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4149 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4150 double sample_end_time_sec = os::elapsedTime(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4151 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4152 g1_policy()->record_collection_pause_end(pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // In prepare_for_verify() below we'll need to scan the deferred |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 // the update buffers we'll probably need to scan cards on the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // on the region is current or not, by incrementing the GC time |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // stamp here we invalidate all the GC time stamps on all the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // all the regions. This is a nicer way of ensuring this rather |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4179 verify_after_gc(); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4180 check_bitmaps("GC End"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 // CM reference discovery will be re-enabled if necessary. |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4186 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4187 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4188 // We should do this after we potentially expand the heap so |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4189 // that all the COMMIT events are generated before the end GC |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4190 // event, and after we retire the GC alloc regions so that all |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4191 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4192 _hr_printer.end_gc(false /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4193 |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4194 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4195 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4196 #endif |
| 342 | 4197 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4198 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4199 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4200 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4201 // Print the remainder of the GC log output. |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4202 log_gc_footer(os::elapsedTime() - pause_start_sec); |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4203 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4204 // It is not yet to safe to tell the concurrent mark to |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4205 // start as we have some optional output below. We don't want the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4206 // output from the concurrent mark thread interfering with this |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4207 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4208 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4209 _hrm.verify_optional(); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4210 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4211 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4212 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4213 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4214 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4215 print_heap_after_gc(); |
| 10405 | 4216 trace_heap_after_gc(_gc_tracer_stw); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4217 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4218 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4219 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4220 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4221 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4222 g1mm()->update_sizes(); |
| 10405 | 4223 |
| 4224 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4225 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
4226 _gc_timer_stw->register_gc_end(); |
| 10405 | 4227 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4228 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4229 // It should now be safe to tell the concurrent mark thread to start |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4230 // without its logging output interfering with the logging output |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4231 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4232 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4233 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4234 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4235 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4236 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4237 // this point does not assume that we are the only GC thread |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4238 // running. Note: of course, the actual marking work will |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4239 // not start until the safepoint itself is released in |
| 20192 | 4240 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4241 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4242 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4243 |
| 1973 | 4244 return true; |
| 342 | 4245 } |
| 4246 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4247 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4248 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4249 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4250 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4251 case GCAllocForSurvived: |
| 6595 | 4252 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4253 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4254 case GCAllocForTenured: |
| 6595 | 4255 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4256 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4257 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4258 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4259 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4260 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4261 } |
| 6595 | 4262 |
| 4263 // Prevent humongous PLAB sizes for two reasons: | |
| 4264 // * PLABs are allocated using a similar paths as oops, but should | |
| 4265 // never be in a humongous region | |
| 4266 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4267 return MIN2(_humongous_object_threshold_in_words, gclab_word_size); | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4268 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4269 |
| 342 | 4270 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { |
| 4271 _drain_in_progress = false; | |
| 4272 set_evac_failure_closure(cl); | |
| 6197 | 4273 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4274 } |
| 4275 | |
| 4276 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4277 assert(_evac_failure_scan_stack != NULL && | |
| 4278 _evac_failure_scan_stack->length() == 0, | |
| 4279 "Postcondition"); | |
| 4280 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4281 delete _evac_failure_scan_stack; |
| 342 | 4282 _evac_failure_scan_stack = NULL; |
| 4283 } | |
| 4284 | |
| 4285 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4286 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4287 |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4288 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4289 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4290 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4291 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4292 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4293 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4294 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4295 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4296 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4297 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4298 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4299 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4300 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4301 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4302 // Reset the claim values in the regions in the collection set. |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4303 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4304 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4305 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4306 |
| 4307 // Now restore saved marks, if any. | |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4308 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4309 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4310 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4311 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4312 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4313 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4314 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4315 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4316 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4317 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4318 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4319 } |
| 4320 | |
| 4321 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4322 _evac_failure_scan_stack->push(obj); | |
| 4323 } | |
| 4324 | |
| 4325 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4326 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4327 | |
| 4328 while (_evac_failure_scan_stack->length() > 0) { | |
| 4329 oop obj = _evac_failure_scan_stack->pop(); | |
| 4330 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4331 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4332 } | |
| 4333 } | |
| 4334 | |
| 4335 oop | |
| 10405 | 4336 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4337 oop old) { |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4338 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4339 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4340 (HeapWord*) old)); |
| 342 | 4341 markOop m = old->mark(); |
| 4342 oop forward_ptr = old->forward_to_atomic(old); | |
| 4343 if (forward_ptr == NULL) { | |
| 4344 // Forward-to-self succeeded. | |
| 10405 | 4345 assert(_par_scan_state != NULL, "par scan state"); |
| 4346 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4347 uint queue_num = _par_scan_state->queue_num(); | |
| 4348 | |
| 4349 _evacuation_failed = true; | |
| 4350 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4351 if (_evac_failure_closure != cl) { |
| 4352 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4353 assert(!_drain_in_progress, | |
| 4354 "Should only be true while someone holds the lock."); | |
| 4355 // Set the global evac-failure closure to the current thread's. | |
| 4356 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4357 set_evac_failure_closure(cl); | |
| 4358 // Now do the common part. | |
| 4359 handle_evacuation_failure_common(old, m); | |
| 4360 // Reset to NULL. | |
| 4361 set_evac_failure_closure(NULL); | |
| 4362 } else { | |
| 4363 // The lock is already held, and this is recursive. | |
| 4364 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4365 handle_evacuation_failure_common(old, m); | |
| 4366 } | |
| 4367 return old; | |
| 4368 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4369 // Forward-to-self failed. Either someone else managed to allocate |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4370 // space for this object (old != forward_ptr) or they beat us in |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4371 // self-forwarding it (old == forward_ptr). |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4372 assert(old == forward_ptr || !obj_in_cs(forward_ptr), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4373 err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4374 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4375 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4376 return forward_ptr; |
| 4377 } | |
| 4378 } | |
| 4379 | |
| 4380 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4381 preserve_mark_if_necessary(old, m); | |
| 4382 | |
| 4383 HeapRegion* r = heap_region_containing(old); | |
| 4384 if (!r->evacuation_failed()) { | |
| 4385 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4386 _hr_printer.evac_failure(r); |
| 342 | 4387 } |
| 4388 | |
| 4389 push_on_evac_failure_scan_stack(old); | |
| 4390 | |
| 4391 if (!_drain_in_progress) { | |
| 4392 // prevent recursion in copy_to_survivor_space() | |
| 4393 _drain_in_progress = true; | |
| 4394 drain_evac_failure_scan_stack(); | |
| 4395 _drain_in_progress = false; | |
| 4396 } | |
| 4397 } | |
| 4398 | |
| 4399 void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { | |
|
2038
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4400 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4401 // We want to call the "for_promotion_failure" version only in the |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4402 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4403 if (m->must_be_preserved_for_promotion_failure(obj)) { |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4404 _objs_with_preserved_marks.push(obj); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4405 _preserved_marks_of_objs.push(m); |
| 342 | 4406 } |
| 4407 } | |
| 4408 | |
| 4409 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4410 size_t word_size, |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4411 AllocationContext_t context) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4412 if (purpose == GCAllocForSurvived) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4413 HeapWord* result = survivor_attempt_allocation(word_size, context); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4414 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4415 return result; |
| 342 | 4416 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4417 // Let's try to allocate in the old gen in case we can fit the |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4418 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4419 return old_attempt_allocation(word_size, context); |
| 342 | 4420 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4422 assert(purpose == GCAllocForTenured, "sanity"); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4423 HeapWord* result = old_attempt_allocation(word_size, context); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4424 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4425 return result; |
| 342 | 4426 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4427 // Let's try to allocate in the survivors in case we can fit the |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4428 // object there. |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4429 return survivor_attempt_allocation(word_size, context); |
| 342 | 4430 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4431 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4432 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4433 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4434 // Trying to keep some compilers happy. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4435 return NULL; |
| 342 | 4436 } |
| 4437 | |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4438 void G1ParCopyHelper::mark_object(oop obj) { |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4439 assert(!_g1->heap_region_containing(obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4440 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4441 // We know that the object is not moving so it's safe to read its size. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4442 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4443 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4444 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4445 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4446 assert(from_obj->is_forwarded(), "from obj should be forwarded"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4447 assert(from_obj->forwardee() == to_obj, "to obj should be the forwardee"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4448 assert(from_obj != to_obj, "should not be self-forwarded"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4449 |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4450 assert(_g1->heap_region_containing(from_obj)->in_collection_set(), "from obj should be in the CSet"); |
|
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4451 assert(!_g1->heap_region_containing(to_obj)->in_collection_set(), "should not mark objects in the CSet"); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4452 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4453 // The object might be in the process of being copied by another |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4454 // worker so we cannot trust that its to-space image is |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4455 // well-formed. So we have to read its size from its from-space |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4456 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4457 _cm->grayRoot(to_obj, (size_t) from_obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4458 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4459 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4460 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4461 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4462 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4463 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4464 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4465 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4466 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4467 template <G1Barrier barrier, G1Mark do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4468 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4469 void G1ParCopyClosure<barrier, do_mark_object>::do_oop_work(T* p) { |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4470 T heap_oop = oopDesc::load_heap_oop(p); |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4471 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4472 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4473 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4474 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4475 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4476 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4477 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4478 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4479 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4480 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4481 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4482 if (state == G1CollectedHeap::InCSet) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4483 oop forwardee; |
| 526 | 4484 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4485 forwardee = obj->forwardee(); |
| 526 | 4486 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4487 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4488 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4489 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4490 oopDesc::encode_store_heap_oop(p, forwardee); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4491 if (do_mark_object != G1MarkNone && forwardee != obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4492 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4493 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4494 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4495 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4496 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4497 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4498 do_klass_barrier(p, forwardee); |
| 342 | 4499 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4500 } else { |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4501 if (state == G1CollectedHeap::IsHumongous) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4502 _g1->set_humongous_is_live(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4503 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4504 // The object is not in collection set. If we're a root scanning |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4505 // closure during an initial mark pause then attempt to mark the object. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4506 if (do_mark_object == G1MarkFromRoot) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4507 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4508 } |
| 526 | 4509 } |
| 4510 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4511 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4512 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4513 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4514 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4515 |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4516 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4517 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4518 |
| 342 | 4519 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4520 protected: | |
| 4521 G1CollectedHeap* _g1h; | |
| 4522 G1ParScanThreadState* _par_scan_state; | |
| 4523 RefToScanQueueSet* _queues; | |
| 4524 ParallelTaskTerminator* _terminator; | |
| 4525 | |
| 4526 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4527 RefToScanQueueSet* queues() { return _queues; } | |
| 4528 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4529 | |
| 4530 public: | |
| 4531 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4532 G1ParScanThreadState* par_scan_state, | |
| 4533 RefToScanQueueSet* queues, | |
| 4534 ParallelTaskTerminator* terminator) | |
| 4535 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4536 _queues(queues), _terminator(terminator) {} | |
| 4537 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4538 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4539 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4540 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4541 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4542 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4543 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4544 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4545 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4546 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4547 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4548 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4549 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4550 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4551 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4552 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4553 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4554 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4555 do { |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4556 pss->steal_and_trim_queue(queues()); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4557 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4558 } |
| 342 | 4559 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4560 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4561 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4562 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4563 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4564 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4565 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4566 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4567 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4568 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4569 // no references into the young gen and we can skip it. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4570 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4571 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4572 klass->clear_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4573 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4574 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4575 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4576 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4577 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4578 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4579 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4580 _closure->set_scanned_klass(NULL); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4581 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4582 _count++; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4583 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4584 }; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4585 |
| 342 | 4586 class G1ParTask : public AbstractGangTask { |
| 4587 protected: | |
| 4588 G1CollectedHeap* _g1h; | |
| 4589 RefToScanQueueSet *_queues; | |
| 4590 ParallelTaskTerminator _terminator; | |
|
4728
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|
4591 uint _n_workers; |
| 342 | 4592 |
| 4593 Mutex _stats_lock; | |
| 4594 Mutex* stats_lock() { return &_stats_lock; } | |
| 4595 | |
| 4596 public: | |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
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|
4597 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4598 : AbstractGangTask("G1 collection"), |
| 4599 _g1h(g1h), | |
| 4600 _queues(task_queues), | |
|
4095
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|
4601 _terminator(0, _queues), |
|
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|
4602 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4603 {} |
| 4604 | |
| 4605 RefToScanQueueSet* queues() { return _queues; } | |
| 4606 | |
| 4607 RefToScanQueue *work_queue(int i) { | |
| 4608 return queues()->queue(i); | |
| 4609 } | |
| 4610 | |
|
4095
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|
4611 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
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|
4612 |
|
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|
4613 virtual void set_for_termination(int active_workers) { |
|
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|
4614 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4615 // in the young space (_par_seq_tasks) in the G1 heap |
|
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|
4616 // for SequentialSubTasksDone. |
|
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|
4617 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
4618 // both of which need setting by set_n_termination(). |
|
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|
4619 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4620 _g1h->set_n_termination(active_workers); |
|
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|
4621 terminator()->reset_for_reuse(active_workers); |
|
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|
4622 _n_workers = active_workers; |
|
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|
4623 } |
|
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|
4624 |
|
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|
4625 // Helps out with CLD processing. |
|
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|
4626 // |
|
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|
4627 // During InitialMark we need to: |
|
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|
4628 // 1) Scavenge all CLDs for the young GC. |
|
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|
4629 // 2) Mark all objects directly reachable from strong CLDs. |
|
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|
4630 template <G1Mark do_mark_object> |
|
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|
4631 class G1CLDClosure : public CLDClosure { |
|
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|
4632 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
|
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|
4633 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
|
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|
4634 G1KlassScanClosure _klass_in_cld_closure; |
|
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|
4635 bool _claim; |
|
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|
4636 |
|
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|
4637 public: |
|
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changeset
|
4638 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
|
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|
4639 bool only_young, bool claim) |
|
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|
4640 : _oop_closure(oop_closure), |
|
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|
4641 _oop_in_klass_closure(oop_closure->g1(), |
|
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|
4642 oop_closure->pss(), |
|
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|
4643 oop_closure->rp()), |
|
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|
4644 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
|
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|
4645 _claim(claim) { |
|
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|
4646 |
|
2c6ef90f030a
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|
4647 } |
|
2c6ef90f030a
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|
4648 |
|
2c6ef90f030a
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|
4649 void do_cld(ClassLoaderData* cld) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4650 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
|
2c6ef90f030a
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|
4651 } |
|
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|
4652 }; |
|
2c6ef90f030a
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|
4653 |
|
2c6ef90f030a
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changeset
|
4654 class G1CodeBlobClosure: public CodeBlobClosure { |
|
2c6ef90f030a
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|
4655 OopClosure* _f; |
|
2c6ef90f030a
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|
4656 |
|
2c6ef90f030a
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changeset
|
4657 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4658 G1CodeBlobClosure(OopClosure* f) : _f(f) {} |
|
2c6ef90f030a
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|
4659 void do_code_blob(CodeBlob* blob) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4660 nmethod* that = blob->as_nmethod_or_null(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
4661 if (that != NULL) { |
|
2c6ef90f030a
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stefank
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changeset
|
4662 if (!that->test_set_oops_do_mark()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4663 that->oops_do(_f); |
|
2c6ef90f030a
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stefank
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diff
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|
4664 that->fix_oop_relocations(); |
|
2c6ef90f030a
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stefank
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diff
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|
4665 } |
|
2c6ef90f030a
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diff
changeset
|
4666 } |
|
2c6ef90f030a
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diff
changeset
|
4667 } |
|
2c6ef90f030a
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diff
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|
4668 }; |
|
2c6ef90f030a
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diff
changeset
|
4669 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4670 void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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4711
diff
changeset
|
4671 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4672 |
| 4673 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4674 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4675 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4676 { |
|
500023bd0818
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5963
diff
changeset
|
4677 ResourceMark rm; |
|
500023bd0818
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5963
diff
changeset
|
4678 HandleMark hm; |
|
500023bd0818
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diff
changeset
|
4679 |
|
500023bd0818
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diff
changeset
|
4680 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
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5963
diff
changeset
|
4681 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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17688
diff
changeset
|
4682 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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diff
changeset
|
4683 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4684 |
|
5986
500023bd0818
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5963
diff
changeset
|
4685 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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diff
changeset
|
4686 |
|
20278
2c6ef90f030a
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changeset
|
4687 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
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|
4688 |
|
2c6ef90f030a
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|
4689 // Non-IM young GC. |
|
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changeset
|
4690 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
|
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|
4691 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
|
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changeset
|
4692 only_young, // Only process dirty klasses. |
|
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changeset
|
4693 false); // No need to claim CLDs. |
|
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changeset
|
4694 // IM young GC. |
|
2c6ef90f030a
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diff
changeset
|
4695 // Strong roots closures. |
|
2c6ef90f030a
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changeset
|
4696 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
|
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changeset
|
4697 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
|
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changeset
|
4698 false, // Process all klasses. |
|
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changeset
|
4699 true); // Need to claim CLDs. |
|
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diff
changeset
|
4700 // Weak roots closures. |
|
2c6ef90f030a
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changeset
|
4701 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
|
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changeset
|
4702 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
|
2c6ef90f030a
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changeset
|
4703 false, // Process all klasses. |
|
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changeset
|
4704 true); // Need to claim CLDs. |
|
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diff
changeset
|
4705 |
|
2c6ef90f030a
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changeset
|
4706 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
|
2c6ef90f030a
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changeset
|
4707 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
|
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changeset
|
4708 // IM Weak code roots are handled later. |
|
2c6ef90f030a
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diff
changeset
|
4709 |
|
2c6ef90f030a
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changeset
|
4710 OopClosure* strong_root_cl; |
|
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changeset
|
4711 OopClosure* weak_root_cl; |
|
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changeset
|
4712 CLDClosure* strong_cld_cl; |
|
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changeset
|
4713 CLDClosure* weak_cld_cl; |
|
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changeset
|
4714 CodeBlobClosure* strong_code_cl; |
|
5986
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5963
diff
changeset
|
4715 |
|
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diff
changeset
|
4716 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
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5963
diff
changeset
|
4717 // We also need to mark copied objects. |
|
20278
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diff
changeset
|
4718 strong_root_cl = &scan_mark_root_cl; |
|
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diff
changeset
|
4719 strong_cld_cl = &scan_mark_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4720 strong_code_cl = &scan_mark_code_cl; |
|
20282
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8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4721 if (ClassUnloadingWithConcurrentMark) { |
|
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8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4722 weak_root_cl = &scan_mark_weak_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4723 weak_cld_cl = &scan_mark_weak_cld_cl; |
|
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8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4724 } else { |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4725 weak_root_cl = &scan_mark_root_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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diff
changeset
|
4726 weak_cld_cl = &scan_mark_cld_cl; |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4727 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4728 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4729 strong_root_cl = &scan_only_root_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4730 weak_root_cl = &scan_only_root_cl; |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4731 strong_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4732 weak_cld_cl = &scan_only_cld_cl; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4733 strong_code_cl = &scan_only_code_cl; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4734 } |
|
500023bd0818
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parents:
5963
diff
changeset
|
4735 |
|
20278
2c6ef90f030a
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diff
changeset
|
4736 |
|
2c6ef90f030a
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changeset
|
4737 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4738 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4739 pss.start_strong_roots(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
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changeset
|
4740 _g1h->g1_process_roots(strong_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4741 weak_root_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4742 &push_heap_rs_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4743 strong_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4744 weak_cld_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4745 strong_code_cl, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4746 worker_id); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
4747 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4748 pss.end_strong_roots(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4749 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4750 { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4751 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4752 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4753 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4754 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4755 double term_ms = pss.term_time()*1000.0; |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4756 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4757 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4758 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4759 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4760 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4761 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4762 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4763 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4764 pss.print_termination_stats(worker_id); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4765 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4766 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4767 assert(pss.queue_is_empty(), "should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4768 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4769 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4770 // destructors are executed here and are included as part of the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4771 // "GC Worker Time". |
| 342 | 4772 } |
| 4773 | |
| 1611 | 4774 double end_time_ms = os::elapsedTime() * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4775 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4776 } |
| 4777 }; | |
| 4778 | |
| 4779 // *** Common G1 Evacuation Stuff | |
| 4780 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4781 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4782 |
| 342 | 4783 void |
| 4784 G1CollectedHeap:: | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4785 g1_process_roots(OopClosure* scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4786 OopClosure* scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4787 OopsInHeapRegionClosure* scan_rs, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4788 CLDClosure* scan_strong_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4789 CLDClosure* scan_weak_clds, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4790 CodeBlobClosure* scan_strong_code, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4791 uint worker_i) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4792 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4793 // First scan the shared roots. |
| 342 | 4794 double ext_roots_start = os::elapsedTime(); |
| 4795 double closure_app_time_sec = 0.0; | |
| 4796 | |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4797 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4798 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4799 |
| 342 | 4800 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4801 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4802 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4803 process_roots(false, // no scoping; this is parallel code |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4804 SharedHeap::SO_None, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4805 &buf_scan_non_heap_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4806 &buf_scan_non_heap_weak_roots, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4807 scan_strong_clds, |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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20279
diff
changeset
|
4808 // Unloading Initial Marks handle the weak CLDs separately. |
|
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
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20279
diff
changeset
|
4809 (trace_metadata ? NULL : scan_weak_clds), |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4810 scan_strong_code); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4811 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4812 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4813 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4814 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4815 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4816 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4817 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4818 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4819 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4820 |
|
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4821 if (trace_metadata) { |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4822 // Barrier to make sure all workers passed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4823 // the strong CLD and strong nmethods phases. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4824 active_strong_roots_scope()->wait_until_all_workers_done_with_threads(n_par_threads()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4825 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4826 // Now take the complement of the strong CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4827 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4828 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4829 |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4830 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4831 buf_scan_non_heap_roots.done(); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4832 buf_scan_non_heap_weak_roots.done(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4833 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4834 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds() |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4835 + buf_scan_non_heap_weak_roots.closure_app_seconds(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4836 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4837 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4838 |
| 342 | 4839 double ext_root_time_ms = |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4840 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4841 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4842 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4843 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4844 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4845 // to make sure we remove any oops into the CSet (which will show up |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4846 // as implicitly live). |
|
6628
bb3f6194fedb
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brutisso
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6611
diff
changeset
|
4847 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
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4785
diff
changeset
|
4848 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4849 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
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brutisso
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6611
diff
changeset
|
4850 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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6611
diff
changeset
|
4851 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4852 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
bb3f6194fedb
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diff
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|
4853 |
|
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brutisso
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6611
diff
changeset
|
4854 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4855 } |
|
2ace1c4ee8da
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parents:
4785
diff
changeset
|
4856 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4857 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4858 |
| 4859 // Now scan the complement of the collection set. | |
|
20278
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changeset
|
4860 MarkingCodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots, CodeBlobToOopClosure::FixRelocations); |
|
2c6ef90f030a
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|
4861 |
|
2c6ef90f030a
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diff
changeset
|
4862 g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i); |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
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20254
diff
changeset
|
4863 |
| 342 | 4864 _process_strong_tasks->all_tasks_completed(); |
| 4865 } | |
| 4866 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
4867 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
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|
4868 private: |
|
5a32d2a3cc1e
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diff
changeset
|
4869 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
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diff
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|
4870 int _initial_string_table_size; |
|
5a32d2a3cc1e
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diff
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|
4871 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
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diff
changeset
|
4872 |
|
5a32d2a3cc1e
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diff
changeset
|
4873 bool _process_strings; |
|
5a32d2a3cc1e
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changeset
|
4874 int _strings_processed; |
|
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diff
changeset
|
4875 int _strings_removed; |
|
5a32d2a3cc1e
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changeset
|
4876 |
|
5a32d2a3cc1e
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diff
changeset
|
4877 bool _process_symbols; |
|
5a32d2a3cc1e
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diff
changeset
|
4878 int _symbols_processed; |
|
5a32d2a3cc1e
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changeset
|
4879 int _symbols_removed; |
|
17652
0eb64cfc0b76
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17651
diff
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|
4880 |
|
0eb64cfc0b76
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|
4881 bool _do_in_parallel; |
|
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|
4882 public: |
|
5a32d2a3cc1e
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|
4883 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
20278
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|
4884 AbstractGangTask("String/Symbol Unlinking"), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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|
4885 _is_alive(is_alive), |
|
17652
0eb64cfc0b76
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tschatzl
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17651
diff
changeset
|
4886 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
5a32d2a3cc1e
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|
4887 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
5a32d2a3cc1e
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|
4888 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
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|
4889 |
|
5a32d2a3cc1e
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diff
changeset
|
4890 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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diff
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|
4891 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4892 if (process_strings) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4893 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4894 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4895 if (process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4896 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4897 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4898 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4899 |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4900 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
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tschatzl
parents:
17651
diff
changeset
|
4901 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
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|
4902 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4903 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
0eb64cfc0b76
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tschatzl
parents:
17651
diff
changeset
|
4904 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4905 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4906 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4907 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4908 if (G1TraceStringSymbolTableScrubbing) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4909 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4910 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4911 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4912 strings_processed(), strings_removed(), |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4913 symbols_processed(), symbols_removed()); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4914 } |
|
17634
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4915 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4916 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4917 void work(uint worker_id) { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4918 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4919 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4920 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4921 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4922 int symbols_removed = 0; |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4923 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4924 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
4925 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4926 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4927 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4928 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4929 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4930 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4931 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4932 } |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4933 } else { |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4934 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4935 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
4936 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4937 if (_process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
4938 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4939 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4940 } |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4941 } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4942 |
|
5a32d2a3cc1e
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tschatzl
parents:
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diff
changeset
|
4943 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4944 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
4945 |
|
5a32d2a3cc1e
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diff
changeset
|
4946 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4947 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4948 }; |
|
5a32d2a3cc1e
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13400
diff
changeset
|
4949 |
|
20278
2c6ef90f030a
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changeset
|
4950 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4951 private: |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4952 static Monitor* _lock; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4953 |
|
2c6ef90f030a
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diff
changeset
|
4954 BoolObjectClosure* const _is_alive; |
|
2c6ef90f030a
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stefank
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changeset
|
4955 const bool _unloading_occurred; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4956 const uint _num_workers; |
|
2c6ef90f030a
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changeset
|
4957 |
|
2c6ef90f030a
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20274
diff
changeset
|
4958 // Variables used to claim nmethods. |
|
2c6ef90f030a
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stefank
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changeset
|
4959 nmethod* _first_nmethod; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4960 volatile nmethod* _claimed_nmethod; |
|
2c6ef90f030a
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stefank
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diff
changeset
|
4961 |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4962 // The list of nmethods that need to be processed by the second pass. |
|
2c6ef90f030a
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stefank
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changeset
|
4963 volatile nmethod* _postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4964 volatile uint _num_entered_barrier; |
|
2c6ef90f030a
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diff
changeset
|
4965 |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4966 public: |
|
2c6ef90f030a
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stefank
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20274
diff
changeset
|
4967 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
|
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|
4968 _is_alive(is_alive), |
|
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|
4969 _unloading_occurred(unloading_occurred), |
|
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|
4970 _num_workers(num_workers), |
|
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|
4971 _first_nmethod(NULL), |
|
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|
4972 _claimed_nmethod(NULL), |
|
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|
4973 _postponed_list(NULL), |
|
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|
4974 _num_entered_barrier(0) |
|
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|
4975 { |
|
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|
4976 nmethod::increase_unloading_clock(); |
|
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|
4977 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
|
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|
4978 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
|
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|
4979 } |
|
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changeset
|
4980 |
|
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changeset
|
4981 ~G1CodeCacheUnloadingTask() { |
|
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|
4982 CodeCache::verify_clean_inline_caches(); |
|
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|
4983 |
|
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changeset
|
4984 CodeCache::set_needs_cache_clean(false); |
|
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|
4985 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
|
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changeset
|
4986 |
|
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changeset
|
4987 CodeCache::verify_icholder_relocations(); |
|
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|
4988 } |
|
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diff
changeset
|
4989 |
|
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|
4990 private: |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4991 void add_to_postponed_list(nmethod* nm) { |
|
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|
4992 nmethod* old; |
|
2c6ef90f030a
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diff
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|
4993 do { |
|
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|
4994 old = (nmethod*)_postponed_list; |
|
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|
4995 nm->set_unloading_next(old); |
|
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|
4996 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
|
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|
4997 } |
|
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diff
changeset
|
4998 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4999 void clean_nmethod(nmethod* nm) { |
|
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|
5000 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
|
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diff
changeset
|
5001 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5002 if (postponed) { |
|
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|
5003 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
|
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|
5004 add_to_postponed_list(nm); |
|
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diff
changeset
|
5005 } |
|
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diff
changeset
|
5006 |
|
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diff
changeset
|
5007 // Mark that this thread has been cleaned/unloaded. |
|
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|
5008 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
|
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changeset
|
5009 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
|
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changeset
|
5010 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5011 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5012 void clean_nmethod_postponed(nmethod* nm) { |
|
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diff
changeset
|
5013 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
|
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diff
changeset
|
5014 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5015 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5016 static const int MaxClaimNmethods = 16; |
|
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diff
changeset
|
5017 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5018 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5019 nmethod* first; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5020 nmethod* last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5021 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5022 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5023 *num_claimed_nmethods = 0; |
|
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stefank
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diff
changeset
|
5024 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5025 first = last = (nmethod*)_claimed_nmethod; |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5026 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5027 if (first != NULL) { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5028 for (int i = 0; i < MaxClaimNmethods; i++) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5029 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5030 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5031 if (last == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5032 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5033 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5034 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5035 claimed_nmethods[i] = last; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5036 (*num_claimed_nmethods)++; |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5037 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5038 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5039 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5040 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5041 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5042 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5043 nmethod* claim_postponed_nmethod() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5044 nmethod* claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5045 nmethod* next; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5046 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5047 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5048 claim = (nmethod*)_postponed_list; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5049 if (claim == NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5050 return NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5051 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5052 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5053 next = claim->unloading_next(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5054 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5055 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5056 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5057 return claim; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5058 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5059 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5061 // Mark that we're done with the first pass of nmethod cleaning. |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5062 void barrier_mark(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5063 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5064 _num_entered_barrier++; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5065 if (_num_entered_barrier == _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5066 ml.notify_all(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5067 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
5068 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5069 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5070 // See if we have to wait for the other workers to |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5071 // finish their first-pass nmethod cleaning work. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5072 void barrier_wait(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5073 if (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5074 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5075 while (_num_entered_barrier < _num_workers) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5076 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5077 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5078 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5079 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5080 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5081 // Cleaning and unloading of nmethods. Some work has to be postponed |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5082 // to the second pass, when we know which nmethods survive. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5083 void work_first_pass(uint worker_id) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5084 // The first nmethods is claimed by the first worker. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5085 if (worker_id == 0 && _first_nmethod != NULL) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5086 clean_nmethod(_first_nmethod); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5087 _first_nmethod = NULL; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5088 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5089 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5090 int num_claimed_nmethods; |
|
2c6ef90f030a
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|
5091 nmethod* claimed_nmethods[MaxClaimNmethods]; |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5092 |
|
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diff
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|
5093 while (true) { |
|
2c6ef90f030a
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changeset
|
5094 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
|
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|
5095 |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5096 if (num_claimed_nmethods == 0) { |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5097 break; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5098 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5099 |
|
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|
5100 for (int i = 0; i < num_claimed_nmethods; i++) { |
|
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|
5101 clean_nmethod(claimed_nmethods[i]); |
|
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5102 } |
|
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diff
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|
5103 } |
|
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diff
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|
5104 } |
|
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diff
changeset
|
5105 |
|
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|
5106 void work_second_pass(uint worker_id) { |
|
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|
5107 nmethod* nm; |
|
2c6ef90f030a
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|
5108 // Take care of postponed nmethods. |
|
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|
5109 while ((nm = claim_postponed_nmethod()) != NULL) { |
|
2c6ef90f030a
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|
5110 clean_nmethod_postponed(nm); |
|
2c6ef90f030a
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|
5111 } |
|
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|
5112 } |
|
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|
5113 }; |
|
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|
5114 |
|
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|
5115 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
|
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|
5116 |
|
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|
5117 class G1KlassCleaningTask : public StackObj { |
|
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|
5118 BoolObjectClosure* _is_alive; |
|
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|
5119 volatile jint _clean_klass_tree_claimed; |
|
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|
5120 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
|
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|
5121 |
|
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|
5122 public: |
|
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|
5123 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
|
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|
5124 _is_alive(is_alive), |
|
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|
5125 _clean_klass_tree_claimed(0), |
|
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|
5126 _klass_iterator() { |
|
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|
5127 } |
|
2c6ef90f030a
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diff
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|
5128 |
|
2c6ef90f030a
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diff
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|
5129 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
5130 bool claim_clean_klass_tree_task() { |
|
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|
5131 if (_clean_klass_tree_claimed) { |
|
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|
5132 return false; |
|
2c6ef90f030a
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diff
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|
5133 } |
|
2c6ef90f030a
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|
5134 |
|
2c6ef90f030a
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|
5135 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
|
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|
5136 } |
|
2c6ef90f030a
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diff
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|
5137 |
|
2c6ef90f030a
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|
5138 InstanceKlass* claim_next_klass() { |
|
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|
5139 Klass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5140 do { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5141 klass =_klass_iterator.next_klass(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5142 } while (klass != NULL && !klass->oop_is_instance()); |
|
2c6ef90f030a
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|
5143 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5144 return (InstanceKlass*)klass; |
|
2c6ef90f030a
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diff
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|
5145 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5146 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5147 public: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5148 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5149 void clean_klass(InstanceKlass* ik) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
5150 ik->clean_implementors_list(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5151 ik->clean_method_data(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5152 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5153 // G1 specific cleanup work that has |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
5154 // been moved here to be done in parallel. |
|
2c6ef90f030a
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diff
changeset
|
5155 ik->clean_dependent_nmethods(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
5156 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5157 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5158 void work() { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5159 ResourceMark rm; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
5160 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5161 // One worker will clean the subklass/sibling klass tree. |
|
2c6ef90f030a
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changeset
|
5162 if (claim_clean_klass_tree_task()) { |
|
2c6ef90f030a
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changeset
|
5163 Klass::clean_subklass_tree(_is_alive); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
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|
5164 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5165 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5166 // All workers will help cleaning the classes, |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5167 InstanceKlass* klass; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
5168 while ((klass = claim_next_klass()) != NULL) { |
|
2c6ef90f030a
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changeset
|
5169 clean_klass(klass); |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5170 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5171 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5172 }; |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5173 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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20274
diff
changeset
|
5174 // To minimize the remark pause times, the tasks below are done in parallel. |
|
2c6ef90f030a
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changeset
|
5175 class G1ParallelCleaningTask : public AbstractGangTask { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
5176 private: |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5177 G1StringSymbolTableUnlinkTask _string_symbol_task; |
|
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diff
changeset
|
5178 G1CodeCacheUnloadingTask _code_cache_task; |
|
2c6ef90f030a
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|
5179 G1KlassCleaningTask _klass_cleaning_task; |
|
2c6ef90f030a
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diff
changeset
|
5180 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5181 public: |
|
2c6ef90f030a
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stefank
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diff
changeset
|
5182 // The constructor is run in the VMThread. |
|
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diff
changeset
|
5183 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
|
2c6ef90f030a
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changeset
|
5184 AbstractGangTask("Parallel Cleaning"), |
|
2c6ef90f030a
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diff
changeset
|
5185 _string_symbol_task(is_alive, process_strings, process_symbols), |
|
2c6ef90f030a
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changeset
|
5186 _code_cache_task(num_workers, is_alive, unloading_occurred), |
|
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|
5187 _klass_cleaning_task(is_alive) { |
|
2c6ef90f030a
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diff
changeset
|
5188 } |
|
2c6ef90f030a
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diff
changeset
|
5189 |
|
2c6ef90f030a
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diff
changeset
|
5190 // The parallel work done by all worker threads. |
|
2c6ef90f030a
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changeset
|
5191 void work(uint worker_id) { |
|
2c6ef90f030a
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diff
changeset
|
5192 // Do first pass of code cache cleaning. |
|
2c6ef90f030a
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diff
changeset
|
5193 _code_cache_task.work_first_pass(worker_id); |
|
2c6ef90f030a
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changeset
|
5194 |
| 20279 | 5195 // Let the threads mark that the first pass is done. |
|
20278
2c6ef90f030a
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changeset
|
5196 _code_cache_task.barrier_mark(worker_id); |
|
2c6ef90f030a
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changeset
|
5197 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
5198 // Clean the Strings and Symbols. |
|
2c6ef90f030a
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diff
changeset
|
5199 _string_symbol_task.work(worker_id); |
|
2c6ef90f030a
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changeset
|
5200 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
5201 // Wait for all workers to finish the first code cache cleaning pass. |
|
2c6ef90f030a
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changeset
|
5202 _code_cache_task.barrier_wait(worker_id); |
|
2c6ef90f030a
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changeset
|
5203 |
|
2c6ef90f030a
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diff
changeset
|
5204 // Do the second code cache cleaning work, which realize on |
|
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changeset
|
5205 // the liveness information gathered during the first pass. |
|
2c6ef90f030a
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changeset
|
5206 _code_cache_task.work_second_pass(worker_id); |
|
2c6ef90f030a
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changeset
|
5207 |
|
2c6ef90f030a
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diff
changeset
|
5208 // Clean all klasses that were not unloaded. |
|
2c6ef90f030a
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changeset
|
5209 _klass_cleaning_task.work(); |
|
2c6ef90f030a
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changeset
|
5210 } |
|
2c6ef90f030a
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diff
changeset
|
5211 }; |
|
2c6ef90f030a
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diff
changeset
|
5212 |
|
2c6ef90f030a
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diff
changeset
|
5213 |
|
2c6ef90f030a
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changeset
|
5214 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
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stefank
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changeset
|
5215 bool process_strings, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5216 bool process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5217 bool class_unloading_occurred) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5218 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5219 workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5220 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5221 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5222 n_workers, class_unloading_occurred); |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5223 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5224 set_par_threads(n_workers); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5225 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5226 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5227 } else { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5228 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5229 } |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5230 } |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5231 |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5232 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5233 bool process_strings, bool process_symbols) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5234 { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5235 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5236 _g1h->workers()->active_workers() : 1); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5237 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5238 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5239 set_par_threads(n_workers); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5240 workers()->run_task(&g1_unlink_task); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5241 set_par_threads(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5242 } else { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5243 g1_unlink_task.work(0); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5244 } |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5245 } |
| 17764 | 5246 |
| 5247 if (G1StringDedup::is_enabled()) { | |
| 5248 G1StringDedup::unlink(is_alive); | |
| 5249 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5250 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5251 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5252 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5253 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5254 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5255 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5256 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5257 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5258 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5259 double start_time = os::elapsedTime(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5260 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5261 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5262 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5263 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5264 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5265 _queue->apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5266 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5267 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5268 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5269 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5270 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5271 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5272 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5273 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5274 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5275 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5276 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5277 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5278 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5279 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5280 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5281 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5282 dirty_card_queue_set().reset_for_par_iteration(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5283 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5284 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5285 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5286 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5287 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5288 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5289 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5290 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5291 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5292 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5293 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5294 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5295 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5296 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5297 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5300 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5301 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5303 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5312 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5313 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5314 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5315 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5317 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5318 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5320 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5321 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5322 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5324 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5328 void do_oop(oop* p) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5331 G1CollectedHeap::in_cset_state_t cset_state = _g1->in_cset_state(obj); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5332 if (obj == NULL || cset_state == G1CollectedHeap::InNeither) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5333 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5334 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5335 if (cset_state == G1CollectedHeap::InCSet) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5336 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 *p = obj->forwardee(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5338 } else { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
5339 assert(!obj->is_forwarded(), "invariant" ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
5340 assert(cset_state == G1CollectedHeap::IsHumongous, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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diff
changeset
|
5341 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state)); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
5342 _g1->set_humongous_is_live(obj); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5343 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5352 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5353 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5354 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5355 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5356 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5359 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5362 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5365 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5366 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5367 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5368 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5369 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5370 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5371 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
5372 if (_g1h->is_in_cset_or_humongous(obj)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5375 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5376 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5378 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5379 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 // new location, and the RSet updated. Otherwise we need to |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5387 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5388 // the referent object and update the pointer, while avoiding |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5394 assert(!Metaspace::contains((const void*)p), |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5395 err_msg("Unexpectedly found a pointer from metadata: " |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5396 PTR_FORMAT, p)); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5397 _copy_non_heap_obj_cl->do_oop(p); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5400 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5435 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5440 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5448 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 ProcessTask& _proc_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 RefToScanQueueSet *_task_queues; |
|
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|
5463 ParallelTaskTerminator* _terminator; |
|
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|
5464 |
|
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changeset
|
5465 public: |
|
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diff
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|
5466 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5467 G1CollectedHeap* g1h, |
|
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|
5468 RefToScanQueueSet *task_queues, |
|
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|
5469 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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|
5470 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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parents:
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diff
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|
5471 _proc_task(proc_task), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5472 _g1h(g1h), |
|
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diff
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|
5473 _task_queues(task_queues), |
|
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|
5474 _terminator(terminator) |
|
4dfb2df418f2
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parents:
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diff
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|
5475 {} |
|
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diff
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|
5476 |
|
4728
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|
5477 virtual void work(uint worker_id) { |
|
3979
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|
5478 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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|
5479 ResourceMark rm; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5480 HandleMark hm; |
|
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parents:
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diff
changeset
|
5481 |
|
4dfb2df418f2
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parents:
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changeset
|
5482 G1STWIsAliveClosure is_alive(_g1h); |
|
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changeset
|
5483 |
|
17689
5d492d192cbf
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tschatzl
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|
5484 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5485 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
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diff
changeset
|
5486 |
|
3979
4dfb2df418f2
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|
5487 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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changeset
|
5488 |
|
4dfb2df418f2
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changeset
|
5489 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5490 |
|
4dfb2df418f2
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|
5491 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5492 |
|
4dfb2df418f2
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|
5493 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5494 |
|
4dfb2df418f2
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changeset
|
5495 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5496 // We also need to mark copied objects. |
|
4dfb2df418f2
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parents:
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diff
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|
5497 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
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|
5498 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5499 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5500 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5501 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
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|
5502 |
|
4dfb2df418f2
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diff
changeset
|
5503 // Complete GC closure |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5504 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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changeset
|
5505 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5506 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
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changeset
|
5507 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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changeset
|
5508 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5509 // Note we cannot assert that the refs array is empty here as not all |
|
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changeset
|
5510 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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|
5511 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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parents:
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changeset
|
5512 // the queue may not be empty. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5513 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5514 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5515 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5516 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5517 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5518 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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changeset
|
5519 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5520 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5521 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5522 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5523 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5524 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5525 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5527 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5528 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5529 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5530 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5531 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5532 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5533 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5534 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5535 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5536 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5540 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5541 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5542 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5543 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5544 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5545 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5546 |
| 10405 | 5547 // Driver routine for parallel reference enqueueing. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5548 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5549 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5550 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5551 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5552 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5553 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5554 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5555 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5556 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5557 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5558 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5559 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5560 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5562 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5563 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5564 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5565 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5566 |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5567 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 protected: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5569 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5571 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5572 uint _n_workers; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5573 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5574 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5576 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5577 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5578 _queues(task_queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5579 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5580 _n_workers(workers) |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5581 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5582 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5583 void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5584 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5585 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5586 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5587 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5588 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5589 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5591 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5592 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5594 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5598 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5599 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5602 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5603 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5604 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5606 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 // to be copied. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5610 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5614 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5615 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5620 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5624 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5625 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5636 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5640 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5641 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5642 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5644 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5646 assert(pss.queue_is_empty(), "should be"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5651 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 // but would not have treated the reference object as a regular oop. |
| 10405 | 5667 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 |
| 4711 | 5678 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5679 no_of_gc_workers == workers()->active_workers(), |
| 5680 "Need to reset active GC workers"); | |
| 5681 | |
| 5682 set_par_threads(no_of_gc_workers); | |
| 5683 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5684 no_of_gc_workers, | |
| 5685 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // of JNI refs is serial and performed serially by the current thread |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // rather than by a worker. The following PSS will be used for processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5704 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5710 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5713 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // Keep alive closure. |
|
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5727 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 |
| 10405 | 5735 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 // Serial reference processing... |
| 10405 | 5738 stats = rp->process_discovered_references(&is_alive, |
| 5739 &keep_alive, | |
| 5740 &drain_queue, | |
| 5741 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5742 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5743 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 // Parallel reference processing |
| 6819 | 5746 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5747 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5748 | |
| 5749 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5750 stats = rp->process_discovered_references(&is_alive, |
| 5751 &keep_alive, | |
| 5752 &drain_queue, | |
| 5753 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5754 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5755 _gc_tracer_stw->gc_id()); |
| 10405 | 5756 } |
| 5757 | |
| 5758 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
20215
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5759 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5760 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5761 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5764 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5768 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 assert(!rp->discovery_enabled(), "should have been disabled as part of processing"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5778 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 } else { |
| 10405 | 5780 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 |
| 6819 | 5782 assert(no_of_gc_workers == workers()->active_workers(), |
| 5783 "Need to reset active workers"); | |
| 5784 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5785 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5786 | |
| 5787 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5790 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 // CM's reference processing also cleans up the string and symbol tables. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5797 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5800 g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 |
| 10405 | 5803 void G1CollectedHeap::evacuate_collection_set(EvacuationInfo& evacuation_info) { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5804 _expand_heap_after_alloc_failure = true; |
| 10405 | 5805 _evacuation_failed = false; |
| 342 | 5806 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5807 // Should G1EvacuationFailureALot be in effect for this GC? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5808 NOT_PRODUCT(set_evacuation_failure_alot_for_current_gc();) |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5809 |
| 342 | 5810 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5811 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5812 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5813 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5814 hot_card_cache->reset_hot_cache_claimed_index(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5815 hot_card_cache->set_use_cache(false); |
| 889 | 5816 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5817 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5818 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5819 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5820 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5821 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5822 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5823 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5824 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5825 "If not dynamic should be using all the workers"); |
| 4711 | 5826 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5827 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5828 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5829 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5830 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5831 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5832 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5833 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5834 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5835 |
| 5836 init_for_evac_failure(NULL); | |
| 5837 | |
| 5838 rem_set()->prepare_for_younger_refs_iterate(true); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5839 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5840 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5841 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5842 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5843 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5844 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5845 StrongRootsScope srs(this); |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5846 // InitialMark needs claim bits to keep track of the marked-through CLDs. |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5847 if (g1_policy()->during_initial_mark_pause()) { |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5848 ClassLoaderDataGraph::clear_claimed_marks(); |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5849 } |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5850 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5851 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5852 // The individual threads will set their evac-failure closures. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5853 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5854 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5855 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5856 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5857 "If not dynamic should be using all the workers"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5858 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5859 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5860 g1_par_task.set_for_termination(n_workers); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5861 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5862 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5863 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5864 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5865 // Closing the inner scope will execute the destructor |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5866 // for the StrongRootsScope object. We record the current |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5867 // elapsed time before closing the scope so that time |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5868 // taken for the SRS destructor is NOT included in the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5869 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5870 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5871 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5872 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5873 g1_policy()->phase_times()->record_par_time(par_time_ms); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5874 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5875 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5876 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5877 g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5878 |
| 342 | 5879 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5880 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5881 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5882 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5883 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5884 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5885 // not copied during the pause. |
| 6819 | 5886 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5887 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5888 // Weak root processing. |
| 342 | 5889 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5890 G1STWIsAliveClosure is_alive(this); |
| 342 | 5891 G1KeepAliveClosure keep_alive(this); |
| 5892 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5893 if (G1StringDedup::is_enabled()) { |
| 5894 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5895 } | |
| 342 | 5896 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5897 |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5898 _allocator->release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5899 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5900 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5901 // Reset and re-enable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5902 // Note the counts for the cards in the regions in the |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5903 // collection set are reset when the collection set is freed. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5904 hot_card_cache->reset_hot_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5905 hot_card_cache->set_use_cache(true); |
| 342 | 5906 |
| 12080 | 5907 // Migrate the strong code roots attached to each region in |
| 5908 // the collection set. Ideally we would like to do this | |
| 5909 // after we have finished the scanning/evacuation of the | |
| 5910 // strong code roots for a particular heap region. | |
| 5911 migrate_strong_code_roots(); | |
| 5912 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5913 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5914 |
| 12080 | 5915 if (g1_policy()->during_initial_mark_pause()) { |
| 5916 // Reset the claim values set during marking the strong code roots | |
| 5917 reset_heap_region_claim_values(); | |
| 5918 } | |
| 5919 | |
| 342 | 5920 finalize_for_evac_failure(); |
| 5921 | |
| 5922 if (evacuation_failed()) { | |
| 5923 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5924 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5925 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5926 // Note: the values are reset only when an actual |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5927 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5928 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5929 } |
| 5930 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5931 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5932 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5933 // this after the card table is cleaned (and verified) as |
| 10405 | 5934 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5935 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5936 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5937 // RSets. |
| 6819 | 5938 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5939 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5940 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5941 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5942 } |
| 342 | 5943 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5944 } | |
| 5945 | |
| 2152 | 5946 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5947 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5948 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5949 bool locked) { |
| 2152 | 5950 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 5951 assert(!hr->is_empty(), "the region should not be empty"); | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5952 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
| 2152 | 5953 assert(free_list != NULL, "pre-condition"); |
| 5954 | |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5955 if (G1VerifyBitmaps) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5956 MemRegion mr(hr->bottom(), hr->end()); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5957 concurrent_mark()->clearRangePrevBitmap(mr); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5958 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5959 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5960 // Clear the card counts for this region. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5961 // Note: we only need to do this if the region is not young |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5962 // (since we don't refine cards in young regions). |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5963 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5964 _cg1r->hot_card_cache()->reset_card_counts(hr); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5965 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5966 hr->hr_clear(par, true /* clear_space */, locked /* locked */); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
5967 free_list->add_ordered(hr); |
| 2152 | 5968 } |
| 5969 | |
| 5970 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5971 FreeRegionList* free_list, | |
| 5972 bool par) { | |
| 5973 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5974 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5975 |
| 2152 | 5976 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5977 // We need to read this before we make the region non-humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5978 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5979 uint last_index = hr->last_hc_index(); |
| 2152 | 5980 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5981 free_region(hr, free_list, par); |
| 2152 | 5982 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5983 uint i = hr->hrm_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5984 while (i < last_index) { |
| 3766 | 5985 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5986 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5987 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5988 free_region(curr_hr, free_list, par); |
| 2152 | 5989 i += 1; |
| 5990 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5991 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5992 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5993 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5994 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5995 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5996 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5997 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5998 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5999 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6000 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6001 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6002 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6003 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6004 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6005 if (!list->is_empty()) { |
| 2152 | 6006 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6007 _hrm.insert_list_into_free_list(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6008 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6009 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6010 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6012 _allocator->decrease_used(bytes); |
| 342 | 6013 } |
| 6014 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6015 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 6016 G1SATBCardTableModRefBS* _ct_bs; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6017 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6018 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6019 public: |
| 12343 | 6020 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6021 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6022 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6023 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6024 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6025 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6026 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6027 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6028 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6029 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6030 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6031 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6032 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6033 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6034 if (!r->is_survivor()) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6035 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6036 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6037 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6038 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6039 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6040 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6041 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6042 G1CollectedHeap* _g1h; |
| 12343 | 6043 G1SATBCardTableModRefBS* _ct_bs; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6044 public: |
| 12343 | 6045 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6046 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6047 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6048 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6049 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6050 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6051 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6052 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6053 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6054 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6055 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6056 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6057 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6058 // All of the region should be clean. |
| 12343 | 6059 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6060 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6061 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6062 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6063 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6064 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6065 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6066 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6067 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6068 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6069 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6070 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6071 // is dirty. |
| 12343 | 6072 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6073 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6074 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6075 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6076 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6077 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6078 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6079 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6080 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6081 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 6082 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6083 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6084 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6085 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6086 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6087 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6088 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6089 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6090 } |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6091 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6092 bool G1CollectedHeap::verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6093 HeapWord* tams, HeapWord* end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6094 guarantee(tams <= end, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6095 err_msg("tams: "PTR_FORMAT" end: "PTR_FORMAT, tams, end)); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6096 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6097 if (result < end) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6098 gclog_or_tty->cr(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6099 gclog_or_tty->print_cr("## wrong marked address on %s bitmap: "PTR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6100 bitmap_name, result); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6101 gclog_or_tty->print_cr("## %s tams: "PTR_FORMAT" end: "PTR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6102 bitmap_name, tams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6103 return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6104 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6105 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6106 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6107 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6108 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6109 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6110 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6111 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6112 HeapWord* bottom = hr->bottom(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6113 HeapWord* ptams = hr->prev_top_at_mark_start(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6114 HeapWord* ntams = hr->next_top_at_mark_start(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6115 HeapWord* end = hr->end(); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6116 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6117 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6118 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6119 bool res_n = true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6120 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6121 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6122 // if we happen to be in that state. |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6123 if (mark_in_progress() || !_cmThread->in_progress()) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6124 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6125 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6126 if (!res_p || !res_n) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6127 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6128 HR_FORMAT_PARAMS(hr)); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6129 gclog_or_tty->print_cr("#### Caller: %s", caller); |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6130 return false; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6131 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6132 return true; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6133 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6134 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6135 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
|
e0954897238a
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|
6136 if (!G1VerifyBitmaps) return; |
|
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diff
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|
6137 |
|
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|
6138 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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|
6139 } |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
changeset
|
6140 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
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|
6141 class G1VerifyBitmapClosure : public HeapRegionClosure { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6142 private: |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
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|
6143 const char* _caller; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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changeset
|
6144 G1CollectedHeap* _g1h; |
|
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diff
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|
6145 bool _failures; |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
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|
6146 |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
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|
6147 public: |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6148 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
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|
6149 _caller(caller), _g1h(g1h), _failures(false) { } |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6150 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
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|
6151 bool failures() { return _failures; } |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
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|
6152 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6153 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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|
6154 if (hr->continuesHumongous()) return false; |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6155 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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diff
changeset
|
6156 bool result = _g1h->verify_bitmaps(_caller, hr); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
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|
6157 if (!result) { |
|
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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diff
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|
6158 _failures = true; |
|
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diff
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|
6159 } |
|
e0954897238a
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|
6160 return false; |
|
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brutisso
parents:
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diff
changeset
|
6161 } |
|
e0954897238a
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diff
changeset
|
6162 }; |
|
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parents:
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changeset
|
6163 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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parents:
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|
6164 void G1CollectedHeap::check_bitmaps(const char* caller) { |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
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|
6165 if (!G1VerifyBitmaps) return; |
|
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|
6166 |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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changeset
|
6167 G1VerifyBitmapClosure cl(caller, this); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6168 heap_region_iterate(&cl); |
|
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7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
6169 guarantee(!cl.failures(), "bitmap verification"); |
|
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|
6170 } |
|
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changeset
|
6171 #endif // PRODUCT |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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diff
changeset
|
6172 |
| 342 | 6173 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 6174 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 6175 double start = os::elapsedTime(); |
| 6176 | |
| 4023 | 6177 { |
| 6178 // Iterate over the dirty cards region list. | |
| 6179 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 6180 | |
| 4711 | 6181 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 6182 set_par_threads(); | |
| 4023 | 6183 workers()->run_task(&cleanup_task); |
| 6184 set_par_threads(0); | |
| 6185 } else { | |
| 6186 while (_dirty_cards_region_list) { | |
| 6187 HeapRegion* r = _dirty_cards_region_list; | |
| 6188 cleanup_task.clear_cards(r); | |
| 6189 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 6190 if (_dirty_cards_region_list == r) { | |
| 6191 // The last region. | |
| 6192 _dirty_cards_region_list = NULL; | |
| 6193 } | |
| 6194 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
changeset
|
6195 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6196 } |
| 4023 | 6197 #ifndef PRODUCT |
| 6198 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 6199 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 6200 heap_region_iterate(&cleanup_verifier); | |
| 6201 } | |
| 6202 #endif | |
|
940
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apetrusenko
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diff
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|
6203 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6204 |
| 342 | 6205 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6206 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 6207 } |
| 6208 | |
| 10405 | 6209 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 6210 size_t pre_used = 0; |
| 6211 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 6212 | |
| 342 | 6213 double young_time_ms = 0.0; |
| 6214 double non_young_time_ms = 0.0; | |
| 6215 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6216 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6217 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6218 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6219 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6220 |
| 342 | 6221 G1CollectorPolicy* policy = g1_policy(); |
| 6222 | |
| 6223 double start_sec = os::elapsedTime(); | |
| 6224 bool non_young = true; | |
| 6225 | |
| 6226 HeapRegion* cur = cs_head; | |
| 6227 int age_bound = -1; | |
| 6228 size_t rs_lengths = 0; | |
| 6229 | |
| 6230 while (cur != NULL) { | |
| 2361 | 6231 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 6232 if (non_young) { |
| 6233 if (cur->is_young()) { | |
| 6234 double end_sec = os::elapsedTime(); | |
| 6235 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 6236 non_young_time_ms += elapsed_ms; | |
| 6237 | |
| 6238 start_sec = os::elapsedTime(); | |
| 6239 non_young = false; | |
| 6240 } | |
| 6241 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6242 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6243 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6244 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6245 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6246 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6247 start_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6248 non_young = true; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6249 } |
| 342 | 6250 } |
| 6251 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
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17753
diff
changeset
|
6252 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 6253 |
| 6254 HeapRegion* next = cur->next_in_collection_set(); | |
| 6255 assert(cur->in_collection_set(), "bad CS"); | |
| 6256 cur->set_next_in_collection_set(NULL); | |
| 6257 cur->set_in_collection_set(false); | |
| 6258 | |
| 6259 if (cur->is_young()) { | |
| 6260 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6261 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6262 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 6263 size_t words_survived = _surviving_young_words[index]; |
| 6264 cur->record_surv_words_in_group(words_survived); | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6265 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6266 // At this point the we have 'popped' cur from the collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6267 // (linked via next_in_collection_set()) but it is still in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6268 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6269 // _next_young_region field. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6270 cur->set_next_young_region(NULL); |
| 342 | 6271 } else { |
| 6272 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6273 assert(index == -1, "invariant"); |
| 342 | 6274 } |
| 6275 | |
| 6276 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 6277 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 6278 "invariant" ); | |
| 6279 | |
| 6280 if (!cur->evacuation_failed()) { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6281 MemRegion used_mr = cur->used_region(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6282 |
| 342 | 6283 // And the region is empty. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6284 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6285 pre_used += cur->used(); |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
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17753
diff
changeset
|
6286 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 6287 } else { |
| 6288 cur->uninstall_surv_rate_group(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6289 if (cur->is_young()) { |
| 342 | 6290 cur->set_young_index_in_cset(-1); |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6291 } |
| 342 | 6292 cur->set_not_young(); |
| 6293 cur->set_evacuation_failed(false); | |
| 4072 | 6294 // The region is now considered to be old. |
| 6295 _old_set.add(cur); | |
| 10405 | 6296 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6297 } |
| 6298 cur = next; | |
| 6299 } | |
| 6300 | |
| 10405 | 6301 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6302 policy->record_max_rs_lengths(rs_lengths); |
| 6303 policy->cset_regions_freed(); | |
| 6304 | |
| 6305 double end_sec = os::elapsedTime(); | |
| 6306 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6307 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6308 if (non_young) { |
| 342 | 6309 non_young_time_ms += elapsed_ms; |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
6310 } else { |
| 342 | 6311 young_time_ms += elapsed_ms; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
6312 } |
| 342 | 6313 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6314 prepend_to_freelist(&local_free_list); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6315 decrement_summary_bytes(pre_used); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6316 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6317 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6318 } |
| 6319 | |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6320 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6321 private: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6322 FreeRegionList* _free_region_list; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6323 HeapRegionSet* _proxy_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6324 HeapRegionSetCount _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6325 size_t _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6326 public: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6327 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6328 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6329 _free_region_list(free_region_list), _humongous_regions_removed(), _freed_bytes(0) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
6330 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6331 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6332 virtual bool doHeapRegion(HeapRegion* r) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6333 if (!r->startsHumongous()) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6334 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6335 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6336 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6337 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6338 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6339 oop obj = (oop)r->bottom(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6340 CMBitMap* next_bitmap = g1h->concurrent_mark()->nextMarkBitMap(); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6341 |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6342 // The following checks whether the humongous object is live are sufficient. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6343 // The main additional check (in addition to having a reference from the roots |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6344 // or the young gen) is whether the humongous object has a remembered set entry. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6345 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6346 // A humongous object cannot be live if there is no remembered set for it |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6347 // because: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6348 // - there can be no references from within humongous starts regions referencing |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6349 // the object because we never allocate other objects into them. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6350 // (I.e. there are no intra-region references that may be missed by the |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6351 // remembered set) |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6352 // - as soon there is a remembered set entry to the humongous starts region |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6353 // (i.e. it has "escaped" to an old object) this remembered set entry will stay |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6354 // until the end of a concurrent mark. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6355 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6356 // It is not required to check whether the object has been found dead by marking |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6357 // or not, in fact it would prevent reclamation within a concurrent cycle, as |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6358 // all objects allocated during that time are considered live. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6359 // SATB marking is even more conservative than the remembered set. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6360 // So if at this point in the collection there is no remembered set entry, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6361 // nobody has a reference to it. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6362 // At the start of collection we flush all refinement logs, and remembered sets |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6363 // are completely up-to-date wrt to references to the humongous object. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6364 // |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6365 // Other implementation considerations: |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6366 // - never consider object arrays: while they are a valid target, they have not |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6367 // been observed to be used as temporary objects. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6368 // - they would also pose considerable effort for cleaning up the the remembered |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6369 // sets. |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6370 // While this cleanup is not strictly necessary to be done (or done instantly), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6371 // given that their occurrence is very low, this saves us this additional |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6372 // complexity. |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6373 uint region_idx = r->hrm_index(); |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6374 if (g1h->humongous_is_live(region_idx) || |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6375 g1h->humongous_region_is_always_live(region_idx)) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6376 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6377 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6378 gclog_or_tty->print_cr("Live humongous %d region %d with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6379 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6380 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6381 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6382 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6383 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6384 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6385 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6386 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6387 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6388 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6389 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6390 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6391 |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6392 guarantee(!obj->is_objArray(), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6393 err_msg("Eagerly reclaiming object arrays is not supported, but the object "PTR_FORMAT" is.", |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6394 r->bottom())); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6395 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6396 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6397 gclog_or_tty->print_cr("Reclaim humongous region %d start "PTR_FORMAT" region %d length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6398 r->isHumongous(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 r->bottom(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6400 region_idx, |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6401 r->region_num(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6402 r->rem_set()->occupied(), |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6403 r->rem_set()->strong_code_roots_list_length(), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6404 next_bitmap->isMarked(r->bottom()), |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6405 g1h->humongous_is_live(region_idx), |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6406 obj->is_objArray() |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6407 ); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6408 } |
|
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6409 // Need to clear mark bit of the humongous object if already set. |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6410 if (next_bitmap->isMarked(r->bottom())) { |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6411 next_bitmap->clear(r->bottom()); |
|
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6412 } |
|
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6413 _freed_bytes += r->used(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6414 r->set_containing_set(NULL); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6415 _humongous_regions_removed.increment(1u, r->capacity()); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6416 g1h->free_humongous_region(r, _free_region_list, false); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6417 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 return false; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6419 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6420 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6421 HeapRegionSetCount& humongous_free_count() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6422 return _humongous_regions_removed; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6423 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6424 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6425 size_t bytes_freed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6426 return _freed_bytes; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6427 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6428 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6429 size_t humongous_reclaimed() const { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6430 return _humongous_regions_removed.length(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6431 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6432 }; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6433 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6434 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 assert_at_safepoint(true); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6437 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6438 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6439 return; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6440 } |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6442 double start_time = os::elapsedTime(); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6443 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6444 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6446 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6447 heap_region_iterate(&cl); |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6448 |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 HeapRegionSetCount empty_set; |
|
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6450 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
|
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8027959: Early reclamation of large objects in G1
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|
6451 |
|
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|
6452 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
|
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|
6453 if (hr_printer->is_active()) { |
|
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|
6454 FreeRegionListIterator iter(&local_cleanup_list); |
|
755930f931e3
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|
6455 while (iter.more_available()) { |
|
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changeset
|
6456 HeapRegion* hr = iter.get_next(); |
|
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|
6457 hr_printer->cleanup(hr); |
|
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|
6458 } |
|
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|
6459 } |
|
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|
6460 |
|
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changeset
|
6461 prepend_to_freelist(&local_cleanup_list); |
|
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|
6462 decrement_summary_bytes(cl.bytes_freed()); |
|
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|
6463 |
|
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changeset
|
6464 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
|
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changeset
|
6465 cl.humongous_reclaimed()); |
|
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|
6466 } |
|
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|
6467 |
|
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6468 // This routine is similar to the above but does not record |
|
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|
6469 // any policy statistics or update free lists; we are abandoning |
|
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|
6470 // the current incremental collection set in preparation of a |
|
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|
6471 // full collection. After the full GC we will start to build up |
|
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|
6472 // the incremental collection set again. |
|
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|
6473 // This is only called when we're doing a full collection |
|
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|
6474 // and is immediately followed by the tearing down of the young list. |
|
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|
6475 |
|
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changeset
|
6476 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6477 HeapRegion* cur = cs_head; |
|
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|
6478 |
|
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changeset
|
6479 while (cur != NULL) { |
|
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diff
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|
6480 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
6481 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6482 cur->set_next_in_collection_set(NULL); |
|
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|
6483 cur->set_in_collection_set(false); |
|
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changeset
|
6484 cur->set_young_index_in_cset(-1); |
|
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|
6485 cur = next; |
|
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changeset
|
6486 } |
|
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changeset
|
6487 } |
|
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diff
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|
6488 |
| 2152 | 6489 void G1CollectedHeap::set_free_regions_coming() { |
| 6490 if (G1ConcRegionFreeingVerbose) { | |
| 6491 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6492 "setting free regions coming"); | |
| 6493 } | |
| 6494 | |
| 6495 assert(!free_regions_coming(), "pre-condition"); | |
| 6496 _free_regions_coming = true; | |
| 342 | 6497 } |
| 6498 | |
| 2152 | 6499 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
changeset
|
6500 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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diff
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|
6501 |
| 2152 | 6502 { |
| 6503 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6504 _free_regions_coming = false; | |
| 6505 SecondaryFreeList_lock->notify_all(); | |
| 6506 } | |
| 6507 | |
| 6508 if (G1ConcRegionFreeingVerbose) { | |
| 6509 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6510 "reset free regions coming"); | |
| 342 | 6511 } |
| 6512 } | |
| 6513 | |
| 2152 | 6514 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6515 // Most of the time we won't have to wait, so let's do a quick test | |
| 6516 // first before we take the lock. | |
| 6517 if (!free_regions_coming()) { | |
| 6518 return; | |
| 6519 } | |
| 6520 | |
| 6521 if (G1ConcRegionFreeingVerbose) { | |
| 6522 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6523 "waiting for free regions"); | |
| 342 | 6524 } |
| 6525 | |
| 6526 { | |
| 2152 | 6527 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6528 while (free_regions_coming()) { | |
| 6529 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6530 } |
| 2152 | 6531 } |
| 6532 | |
| 6533 if (G1ConcRegionFreeingVerbose) { | |
| 6534 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6535 "done waiting for free regions"); | |
| 6536 } | |
| 342 | 6537 } |
| 6538 | |
| 6539 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6540 assert(heap_lock_held_for_gc(), | |
| 6541 "the heap lock should already be held by or for this thread"); | |
| 6542 _young_list->push_region(hr); | |
| 6543 } | |
| 6544 | |
| 6545 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6546 private: | |
| 6547 bool _success; | |
| 6548 public: | |
| 6549 NoYoungRegionsClosure() : _success(true) { } | |
| 6550 bool doHeapRegion(HeapRegion* r) { | |
| 6551 if (r->is_young()) { | |
| 6552 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6553 r->bottom(), r->end()); | |
| 6554 _success = false; | |
| 6555 } | |
| 6556 return false; | |
| 6557 } | |
| 6558 bool success() { return _success; } | |
| 6559 }; | |
| 6560 | |
|
1394
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diff
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|
6561 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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diff
changeset
|
6562 bool ret = _young_list->check_list_empty(check_sample); |
|
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johnc
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diff
changeset
|
6563 |
|
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diff
changeset
|
6564 if (check_heap) { |
| 342 | 6565 NoYoungRegionsClosure closure; |
| 6566 heap_region_iterate(&closure); | |
| 6567 ret = ret && closure.success(); | |
| 6568 } | |
| 6569 | |
| 6570 return ret; | |
| 6571 } | |
| 6572 | |
| 4072 | 6573 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6574 private: | |
|
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58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6575 HeapRegionSet *_old_set; |
| 2152 | 6576 |
| 342 | 6577 public: |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6578 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6579 |
| 342 | 6580 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6581 if (r->is_empty()) { |
| 6582 // We ignore empty regions, we'll empty the free list afterwards | |
| 6583 } else if (r->is_young()) { | |
| 6584 // We ignore young regions, we'll empty the young list afterwards | |
| 6585 } else if (r->isHumongous()) { | |
| 6586 // We ignore humongous regions, we're not tearing down the | |
| 6587 // humongous region set | |
| 342 | 6588 } else { |
| 4072 | 6589 // The rest should be old |
| 6590 _old_set->remove(r); | |
| 342 | 6591 } |
| 6592 return false; | |
| 6593 } | |
| 6594 | |
| 4072 | 6595 ~TearDownRegionSetsClosure() { |
| 6596 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6597 } |
| 342 | 6598 }; |
| 6599 | |
| 4072 | 6600 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6601 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6602 | |
| 6603 if (!free_list_only) { | |
| 6604 TearDownRegionSetsClosure cl(&_old_set); | |
| 6605 heap_region_iterate(&cl); | |
| 6606 | |
| 17764 | 6607 // Note that emptying the _young_list is postponed and instead done as |
| 6608 // the first step when rebuilding the regions sets again. The reason for | |
| 6609 // this is that during a full GC string deduplication needs to know if | |
| 6610 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6611 } |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6612 _hrm.remove_all_free_regions(); |
| 4072 | 6613 } |
| 6614 | |
| 6615 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6616 private: | |
| 6617 bool _free_list_only; | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6618 HeapRegionSet* _old_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6619 HeapRegionManager* _hrm; |
| 4072 | 6620 size_t _total_used; |
| 6621 | |
| 6622 public: | |
| 6623 RebuildRegionSetsClosure(bool free_list_only, | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6624 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
| 4072 | 6625 _free_list_only(free_list_only), |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6626 _old_set(old_set), _hrm(hrm), _total_used(0) { |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6627 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
| 4072 | 6628 if (!free_list_only) { |
| 6629 assert(_old_set->is_empty(), "pre-condition"); | |
| 6630 } | |
| 6631 } | |
| 6632 | |
| 6633 bool doHeapRegion(HeapRegion* r) { | |
| 6634 if (r->continuesHumongous()) { | |
| 6635 return false; | |
| 6636 } | |
| 6637 | |
| 6638 if (r->is_empty()) { | |
| 6639 // Add free regions to the free list | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6640 r->set_allocation_context(AllocationContext::system()); |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6641 _hrm->insert_into_free_list(r); |
| 4072 | 6642 } else if (!_free_list_only) { |
| 6643 assert(!r->is_young(), "we should not come across young regions"); | |
| 6644 | |
| 6645 if (r->isHumongous()) { | |
| 6646 // We ignore humongous regions, we left the humongous set unchanged | |
| 6647 } else { | |
| 6648 // The rest should be old, add them to the old set | |
| 6649 _old_set->add(r); | |
| 6650 } | |
| 6651 _total_used += r->used(); | |
| 6652 } | |
| 6653 | |
| 6654 return false; | |
| 6655 } | |
| 6656 | |
| 6657 size_t total_used() { | |
| 6658 return _total_used; | |
| 6659 } | |
| 6660 }; | |
| 6661 | |
| 6662 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6663 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6664 | |
| 17764 | 6665 if (!free_list_only) { |
| 6666 _young_list->empty_list(); | |
| 6667 } | |
| 6668 | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6669 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
| 4072 | 6670 heap_region_iterate(&cl); |
| 6671 | |
| 6672 if (!free_list_only) { | |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
6673 _allocator->set_used(cl.total_used()); |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
6674 } |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6675 assert(_allocator->used_unlocked() == recalculate_used(), |
|
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6676 err_msg("inconsistent _allocator->used_unlocked(), " |
| 4072 | 6677 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6678 _allocator->used_unlocked(), recalculate_used())); |
| 342 | 6679 } |
| 6680 | |
| 6681 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6682 _refine_cte_cl->set_concurrent(concurrent); | |
| 6683 } | |
| 6684 | |
| 6685 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6686 HeapRegion* hr = heap_region_containing(p); | |
|
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6687 return hr->is_in(p); |
| 342 | 6688 } |
| 2152 | 6689 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6690 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6691 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6692 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6693 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6694 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6695 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6696 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
6697 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
6698 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6699 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6700 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6701 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6702 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6703 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6704 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6705 check_bitmaps("Mutator Region Allocation", new_alloc_region); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6706 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6707 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6708 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6709 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6710 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6711 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6712 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6713 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6714 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6715 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6716 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6717 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6718 _allocator->increase_used(allocated_bytes); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6719 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6720 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6721 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6722 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6723 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6724 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6725 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6726 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6727 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6728 // in the workgroup. |
| 4711 | 6729 assert(G1CollectedHeap::use_parallel_gc_threads(), "shouldn't be here otherwise"); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6730 uint n_workers = workers()->active_workers(); |
| 4711 | 6731 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6732 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6733 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6734 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6735 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6736 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6737 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6738 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6739 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6740 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6741 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6742 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6743 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6744 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6745 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6746 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6747 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6748 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6749 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6750 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6751 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6752 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6753 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6754 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6755 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6756 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6757 // for survivors too. |
|
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6758 new_alloc_region->record_top_and_timestamp(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6759 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6760 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6761 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6762 check_bitmaps("Survivor Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6763 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6764 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6765 check_bitmaps("Old Region Allocation", new_alloc_region); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6766 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6767 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6768 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6769 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6770 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6771 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6772 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6773 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6774 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6775 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6776 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6777 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6778 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6779 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6780 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6781 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6782 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6783 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6784 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6785 } else { |
| 6786 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6787 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6788 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6789 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6790 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6791 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6792 |
| 2152 | 6793 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6794 private: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6795 HeapRegionSet* _old_set; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6796 HeapRegionSet* _humongous_set; |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6797 HeapRegionManager* _hrm; |
| 2152 | 6798 |
| 6799 public: | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6800 HeapRegionSetCount _old_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6801 HeapRegionSetCount _humongous_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6802 HeapRegionSetCount _free_count; |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6803 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6804 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6805 HeapRegionSet* humongous_set, |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6806 HeapRegionManager* hrm) : |
|
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6807 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6808 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6809 |
| 6810 bool doHeapRegion(HeapRegion* hr) { | |
| 6811 if (hr->continuesHumongous()) { | |
| 6812 return false; | |
| 6813 } | |
| 6814 | |
| 6815 if (hr->is_young()) { | |
| 6816 // TODO | |
| 6817 } else if (hr->startsHumongous()) { | |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6818 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6819 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6820 } else if (hr->is_empty()) { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6821 assert(_hrm->is_free(hr), err_msg("Heap region %u is empty but not on the free list.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6822 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6823 } else { |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6824 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6825 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6826 } |
| 6827 return false; | |
| 6828 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6829 |
|
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6830 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6831 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6832 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6833 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
58fc1b1523dc
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6834 |
|
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6835 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
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6836 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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6837 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
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6838 |
|
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|
6839 guarantee(free_list->num_free_regions() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->num_free_regions(), _free_count.length())); |
|
17736
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6840 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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6841 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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6842 } |
| 2152 | 6843 }; |
| 6844 | |
| 6845 void G1CollectedHeap::verify_region_sets() { | |
| 6846 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6847 | |
| 6848 // First, check the explicit lists. | |
|
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6849 _hrm.verify(); |
| 2152 | 6850 { |
| 6851 // Given that a concurrent operation might be adding regions to | |
| 6852 // the secondary free list we have to take the lock before | |
| 6853 // verifying it. | |
| 6854 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
17736
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6855 _secondary_free_list.verify_list(); |
|
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|
6856 } |
| 2152 | 6857 |
| 6858 // If a concurrent region freeing operation is in progress it will | |
| 6859 // be difficult to correctly attributed any free regions we come | |
| 6860 // across to the correct free list given that they might belong to | |
| 6861 // one of several (free_list, secondary_free_list, any local lists, | |
| 6862 // etc.). So, if that's the case we will skip the rest of the | |
| 6863 // verification operation. Alternatively, waiting for the concurrent | |
| 6864 // operation to complete will have a non-trivial effect on the GC's | |
| 6865 // operation (no concurrent operation will last longer than the | |
| 6866 // interval between two calls to verification) and it might hide | |
| 6867 // any issues that we would like to catch during testing. | |
| 6868 if (free_regions_coming()) { | |
| 6869 return; | |
| 6870 } | |
| 6871 | |
| 2361 | 6872 // Make sure we append the secondary_free_list on the free_list so |
| 6873 // that all free regions we will come across can be safely | |
| 6874 // attributed to the free_list. | |
| 6875 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6876 |
| 6877 // Finally, make sure that the region accounting in the lists is | |
| 6878 // consistent with what we see in the heap. | |
| 6879 | |
|
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6880 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
| 2152 | 6881 heap_region_iterate(&cl); |
|
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6882 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
| 342 | 6883 } |
| 12080 | 6884 |
| 6885 // Optimized nmethod scanning | |
| 6886 | |
| 6887 class RegisterNMethodOopClosure: public OopClosure { | |
| 6888 G1CollectedHeap* _g1h; | |
| 6889 nmethod* _nm; | |
| 6890 | |
| 6891 template <class T> void do_oop_work(T* p) { | |
| 6892 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6893 if (!oopDesc::is_null(heap_oop)) { | |
| 6894 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6895 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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6896 assert(!hr->continuesHumongous(), |
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6897 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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6898 " starting at "HR_FORMAT, |
|
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6899 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6900 |
| 6901 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6902 // entries but having duplicates is OK since we "mark" nmethods | |
| 6903 // as visited when we scan the strong code root lists during the GC. | |
| 6904 hr->add_strong_code_root(_nm); | |
|
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6905 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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6906 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
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6907 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6908 } |
| 6909 } | |
| 6910 | |
| 6911 public: | |
| 6912 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6913 _g1h(g1h), _nm(nm) {} | |
| 6914 | |
| 6915 void do_oop(oop* p) { do_oop_work(p); } | |
| 6916 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6917 }; | |
| 6918 | |
| 6919 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6920 G1CollectedHeap* _g1h; | |
| 6921 nmethod* _nm; | |
| 6922 | |
| 6923 template <class T> void do_oop_work(T* p) { | |
| 6924 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6925 if (!oopDesc::is_null(heap_oop)) { | |
| 6926 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6927 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
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|
6928 assert(!hr->continuesHumongous(), |
|
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6929 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
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|
6930 " starting at "HR_FORMAT, |
|
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|
6931 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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6932 |
| 12080 | 6933 hr->remove_strong_code_root(_nm); |
|
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|
6934 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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|
6935 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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|
6936 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6937 } |
| 6938 } | |
| 6939 | |
| 6940 public: | |
| 6941 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6942 _g1h(g1h), _nm(nm) {} | |
| 6943 | |
| 6944 void do_oop(oop* p) { do_oop_work(p); } | |
| 6945 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6946 }; | |
| 6947 | |
| 6948 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6949 CollectedHeap::register_nmethod(nm); | |
| 6950 | |
| 6951 guarantee(nm != NULL, "sanity"); | |
| 6952 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6953 nm->oops_do(®_cl); | |
| 6954 } | |
| 6955 | |
| 6956 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6957 CollectedHeap::unregister_nmethod(nm); | |
| 6958 | |
| 6959 guarantee(nm != NULL, "sanity"); | |
| 6960 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6961 nm->oops_do(®_cl, true); | |
| 6962 } | |
| 6963 | |
| 6964 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6965 public: | |
| 6966 bool doHeapRegion(HeapRegion *hr) { | |
|
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|
6967 assert(!hr->isHumongous(), |
|
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changeset
|
6968 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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|
6969 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6970 hr->migrate_strong_code_roots(); |
| 6971 return false; | |
| 6972 } | |
| 6973 }; | |
| 6974 | |
| 6975 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6976 MigrateCodeRootsHeapRegionClosure cl; | |
| 6977 double migrate_start = os::elapsedTime(); | |
| 6978 collection_set_iterate(&cl); | |
| 6979 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6980 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6981 } | |
| 6982 | |
|
17753
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diff
changeset
|
6983 void G1CollectedHeap::purge_code_root_memory() { |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6984 double purge_start = os::elapsedTime(); |
|
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changeset
|
6985 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
|
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|
6986 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
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changeset
|
6987 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
|
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tschatzl
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changeset
|
6988 } |
|
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changeset
|
6989 |
| 12080 | 6990 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
| 6991 G1CollectedHeap* _g1h; | |
| 6992 | |
| 6993 public: | |
| 6994 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6995 _g1h(g1h) {} | |
| 6996 | |
| 6997 void do_code_blob(CodeBlob* cb) { | |
| 6998 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6999 if (nm == NULL) { | |
| 7000 return; | |
| 7001 } | |
| 7002 | |
|
20191
fd81a5764900
8046231: G1: Code root location ... from nmethod ... not in strong code roots for region
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parents:
20190
diff
changeset
|
7003 if (ScavengeRootsInCode) { |
| 12080 | 7004 _g1h->register_nmethod(nm); |
| 7005 } | |
| 7006 } | |
| 7007 }; | |
| 7008 | |
| 7009 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 7010 RebuildStrongCodeRootClosure blob_cl(this); | |
| 7011 CodeCache::blobs_do(&blob_cl); | |
| 7012 } |